#253A6D
Closest named color: Marine Blue (#01386A). oklch(36% 0.092 265.2), rgb(37, 58, 109).
Aa
White text reads best on this color (11.02:1).
About this color
#253A6D 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 Marine Blue (#01386A), ΔE 0.031 away. White text reads best on it, at 11.02:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.90:1 |
| White text | 11.02:1 |
Values
| HEX | #253A6D |
| RGB | rgb(37, 58, 109) |
| HSL | hsl(223, 49%, 29%) |
| OKLCH | oklch(36% 0.092 265.2) |
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 #253A6D | 11.02:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #253A6D | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #253A6D text on white | 11.02:1 | AAA | Lc 95.3 | Preferred for body text |
| #253A6D text on black | 1.90:1 | Fails | Lc -7.4 | 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
#7F9FE6
oklch(70.7% 0.111 265.2)
-
Step 500
500
#5F85DF
oklch(63.1% 0.142 265.3)
-
Step 600
600
#476DCC
oklch(55.6% 0.153 265.3)
-
Step 700
700
#385BB1
oklch(49.2% 0.143 265)
-
Step 800
800
#2F4A8F
oklch(42.6% 0.119 265.6)
-
Step 900
900 (this color)
#253A6D
oklch(36% 0.092 265.2)
-
Step 950
950
#182543
oklch(27% 0.059 265)
#253A6D 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) | #22406F | 0.018 |
| Deuteranopia (no green cones) | #17396C | 0.016 |
| Tritanopia (no blue cones) | #00464E | 0.079 |
| Achromatopsia (no color) | #3C3C3C | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253A6D
#253A6D
oklch(36% 0.092 265.2)
- #4E3900
#4E3900
oklch(35.8% 0.073 85.4)
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 #253A6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.031
- Twilight Blue #0A437A ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.055
- Marine #042E60 ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.059
- Cobalt #1E488F ΔE 0.065
- Charcoal #264653 ΔE 0.066
Use #253A6D 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.