#252657
Closest named color: Marine (#042E60). oklch(29.7% 0.087 278.9), rgb(37, 38, 87).
Aa
White text reads best on this color (14.06:1).
About this color
#252657 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.087 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.040 away. White text reads best on it, at 14.06:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.49:1 |
| White text | 14.06:1 |
Values
| HEX | #252657 |
| RGB | rgb(37, 38, 87) |
| HSL | hsl(239, 40%, 24%) |
| OKLCH | oklch(29.7% 0.087 278.9) |
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 #252657 | 14.06:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #252657 | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #252657 text on white | 14.06:1 | AAA | Lc 100.6 | Preferred for body text |
| #252657 text on black | 1.49:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FE
oklch(93.5% 0.03 279.6)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B3BAFF
oklch(80.8% 0.098 279.5)
-
Step 400
400
#8D94FF
oklch(70.8% 0.155 278.8)
-
Step 500
500
#7474FF
oklch(63.2% 0.201 278.9)
-
Step 600
600
#5F55F3
oklch(55.6% 0.227 278.8)
-
Step 700
700
#4F43D4
oklch(49.1% 0.213 278.8)
-
Step 800
800
#4039AB
oklch(42.7% 0.175 278.7)
-
Step 900
900
#353387
oklch(37.6% 0.136 278.7)
-
Step 950
950 (this color)
#252657
oklch(29.7% 0.087 278.9)
#252657 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) | #0C2E59 | 0.035 |
| Deuteranopia (no green cones) | #062A56 | 0.036 |
| Tritanopia (no blue cones) | #0F313A | 0.075 |
| Achromatopsia (no color) | #2C2C2C | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252657
#252657
oklch(29.7% 0.087 278.9)
- #352D00
#352D00
oklch(29.7% 0.061 98.6)
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 #252657, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.055
- Midnight Blue #191970 ΔE 0.059
- Gunmetal #293241 ΔE 0.062
- Marine Blue #01386A ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.069
Use #252657 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.