#4290BE
Closest named color: Cool Blue (#4984B8). oklch(62.4% 0.103 237.5), rgb(66, 144, 190).
Aa
Black text reads best on this color (5.96:1).
About this color
#4290BE is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.103 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.033 away. Black text reads best on it, at 5.96:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.96:1 |
| White text | 3.52:1 |
Values
| HEX | #4290BE |
| RGB | rgb(66, 144, 190) |
| HSL | hsl(202, 49%, 50%) |
| OKLCH | oklch(62.4% 0.103 237.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #4290BE | 3.52:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #4290BE | 5.96:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #4290BE text on white | 3.52:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #4290BE text on black | 5.96:1 | AA | Lc -39.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A3C6DE
oklch(80.9% 0.051 238.2)
-
Step 400
400
#6FA8CD
oklch(70.6% 0.081 237.9)
-
Step 500
500 (this color)
#4290BE
oklch(62.4% 0.103 237.5)
-
Step 600
600
#1D7CAD
oklch(55.7% 0.112 237.4)
-
Step 700
700
#0C6894
oklch(49.1% 0.104 237.4)
-
Step 800
800
#115578
oklch(42.7% 0.086 237.3)
-
Step 900
900
#184661
oklch(37.6% 0.068 238.2)
-
Step 950
950
#102939
oklch(26.9% 0.043 239.2)
#4290BE with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #7B8FC0 | 0.060 |
| Deuteranopia (no green cones) | #6983BD | 0.049 |
| Tritanopia (no blue cones) | #009CA0 | 0.071 |
| Achromatopsia (no color) | #898989 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4290BE
#4290BE
oklch(62.4% 0.103 237.5)
- #B67745
#B67745
oklch(62.5% 0.103 57.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #4290BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.033
- Faded Blue #658CBB ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.036
- Off Blue #5684AE ΔE 0.037
- Blue NCS #118AB2 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.039
- Water Blue #0E87CC ΔE 0.047
- Silver Lake Blue #778DA9 ΔE 0.059
Use #4290BE in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.