Inspect DodgerBlue (#1E90FF) in HEX, RGB, HSL, LCH and OKLCH, check its contrast, and copy the value you need.
DodgerBlue
#1E90FF
Black text reads best on this background, at 6.49:1.
DodgerBlue is one of the 148 CSS named colors, and resolves to #1E90FF in every browser. In numbers that is rgb(30, 144, 255) and hsl(210, 100%, 56%). Perceptually it is a mid-toned, vivid color: OKLCH puts its lightness at 65% and its chroma at 0.19. It sits in the blues at 253 degrees of OKLCH hue, and reads as a cool color.
White text only reaches 3.24:1 here, so black text is the safer pairing at 6.49:1. At this chroma it is loud enough to be an accent or a call to action, but it will fight anything else vivid placed next to it.
The closest CSS named colors to DodgerBlue, measured with CIEDE2000, are CornflowerBlue (#6495ED), SteelBlue (#4682B4), RoyalBlue (#4169E1). If DodgerBlue is not quite right, those are the nearest keywords to try before reaching for a custom value.
HEX
#1E90FF
RGB
rgb(30, 144, 255)
HSL
hsl(210, 100%, 56%)
HWB
hwb(210 12% 0%)
CMYK
cmyk(88%, 44%, 0%, 0%)
LAB
lab(58.36 0.89 -64.78)
LCH
lch(58.36 64.79 270.79)
OKLCH
oklch(65.2% 0.1901 253.21)
WCAG asks for 4.5:1 between body text and its background. On #1E90FF white text measures 3.24:1 and black text 6.49:1, so black clears it and white does not.
White text on DodgerBlue
WCAG 2.2
3.24:1
APCA
Lc 64
Fails AA body text
Fails AAA body text
Passes AA large text
Black text on DodgerBlue
WCAG 2.2
6.49:1
APCA
Lc 45
Passes AA body text
Fails AAA body text
Passes AA large text
Check DodgerBlue against any other color in the contrast checker.
DodgerBlue sits at 65% OKLCH lightness. Holding its hue and chroma and moving only that value carries it up to #F4F9FF and down to #000613, which keeps the family recognizable instead of letting it drift toward gray the way a plain HSL ramp does.
#59A7FF
20% lighter
#84BCFF
40% lighter
#AAD1FF
60% lighter
#D0E5FF
80% lighter
#F4F9FF
100% lighter
#0070CF
20% darker
#00529A
40% darker
#003669
60% darker
#001C3C
80% darker
#000613
100% darker
Build a full accessible scale from #1E90FF in the shade generator.
Hues rotated around #1E90FF in OKLCH, then pulled back into the sRGB gamut. Each swatch is labelled with the nearest CSS named color so you have a keyword to start from.
DodgerBlue sits at 253 degrees. Rotating it a half turn lands on 73 degrees, the hue directly opposite. It is the strongest pairing you can make without changing lightness, and the one most likely to vibrate if you use both at full chroma.
The neighbors of DodgerBlue at 223 and 283 degrees. They stay close enough to read as the same family, which is what you want for hover states, secondary surfaces and gradients.
253, 13 and 133 degrees divide the wheel into thirds. Balanced enough to carry a whole palette without one color dominating the other two.
Instead of the complement at 73 degrees, this pair flanks it at 43 and 103. You keep most of the contrast of a complementary pairing while losing the harshness.
Explore more combinations around DodgerBlue on the color wheel.
The biggest shift is under tritanopia, where #1E90FF reads as #00A9B1, 27.4 CIEDE2000 units away. If DodgerBlue is the only thing marking a state or a series, roughly one viewer in twelve will miss it.
Protanopia
#688EFF
Deuteranopia
#4D75FD
Tritanopia
#00A9B1
Achromatopsia
#808080
The nearest CSS keywords to #1E90FF, ranked by perceptual distance rather than by how close their hex digits happen to look.