#253B6E
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.092 264.7), rgb(37, 59, 110).
Aa
White text reads best on this color (10.88:1).
About this color
#253B6E is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.092 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.032 away. White text reads best on it, at 10.88:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.92:1 |
| White text | 10.88:1 |
Values
| HEX | #253B6E |
| RGB | rgb(37, 59, 110) |
| HSL | hsl(222, 50%, 29%) |
| OKLCH | oklch(36.3% 0.092 264.7) |
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 #253B6E | 10.88:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #253B6E | 1.92:1 | Fails | Lc 8.9 | Not readable |
| #253B6E text on white | 10.88:1 | AAA | Lc 95.0 | Preferred for body text |
| #253B6E text on black | 1.92:1 | Fails | Lc -7.6 | Not readable |
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 900.
-
Step 50
50
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ABC1EE
oklch(81% 0.068 264.5)
-
Step 400
400
#7E9FE6
oklch(70.7% 0.111 264.7)
-
Step 500
500
#5E86DF
oklch(63.2% 0.142 264.5)
-
Step 600
600
#456DCC
oklch(55.5% 0.154 264.7)
-
Step 700
700
#375BB1
oklch(49.2% 0.143 264.6)
-
Step 800
800
#2E4B8F
oklch(42.8% 0.118 264.6)
-
Step 900
900 (this color)
#253B6E
oklch(36.3% 0.092 264.7)
-
Step 950
950
#182543
oklch(27% 0.059 265)
#253B6E 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) | #234070 | 0.015 |
| Deuteranopia (no green cones) | #183A6D | 0.015 |
| Tritanopia (no blue cones) | #00474F | 0.079 |
| Achromatopsia (no color) | #3D3D3D | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253B6E
#253B6E
oklch(36.3% 0.092 264.7)
- #503A00
#503A00
oklch(36.3% 0.074 84.6)
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 #253B6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.032
- Marine Blue #01386A ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.054
- Marine #042E60 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.060
- Cobalt #1E488F ΔE 0.062
- Charcoal #264653 ΔE 0.065
Use #253B6E 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.