#252B39
Closest named color: Space Cadet (#2B2D42). oklch(29% 0.027 266.6), rgb(37, 43, 57).
Aa
White text reads best on this color (14.15:1).
About this color
#252B39 is a dark close to neutral grey. In OKLCH its lightness is 29%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Space Cadet (#2B2D42), ΔE 0.020 away. White text reads best on it, at 14.15:1.
| Hue family | Neutrals |
| Lightness | dark (29%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.48:1 |
| White text | 14.15:1 |
Values
| HEX | #252B39 |
| RGB | rgb(37, 43, 57) |
| HSL | hsl(222, 21%, 18%) |
| OKLCH | oklch(29% 0.027 266.6) |
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 #252B39 | 14.15:1 | AAA | Lc -103.8 | Preferred for body text |
| Black text on #252B39 | 1.48:1 | Fails | Lc 0.0 | Not readable |
| #252B39 text on white | 14.15:1 | AAA | Lc 100.9 | Preferred for body text |
| #252B39 text on black | 1.48:1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E5
oklch(88.5% 0.017 267.8)
-
Step 300
300
#B7C1D6
oklch(81% 0.032 265.3)
-
Step 400
400
#92A0C1
oklch(70.6% 0.051 267)
-
Step 500
500
#7789B2
oklch(63.1% 0.066 266.1)
-
Step 600
600
#60729E
oklch(55.5% 0.072 266.9)
-
Step 700
700
#4F6087
oklch(49.2% 0.066 265.9)
-
Step 800
800
#414E6E
oklch(42.7% 0.056 267)
-
Step 900
900
#374159
oklch(37.7% 0.043 266.8)
-
Step 950
950 (this color)
#252B39
oklch(29% 0.027 266.6)
#252B39 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) | #272C3A | 0.005 |
| Deuteranopia (no green cones) | #252A39 | 0.003 |
| Tritanopia (no blue cones) | #1F2E30 | 0.025 |
| Achromatopsia (no color) | #2B2B2B | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252B39
#252B39
oklch(29% 0.027 266.6)
- #312A1C
#312A1C
oklch(28.8% 0.026 84.3)
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 #252B39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.020
- Oxford Blue #1B263B ΔE 0.026
- Gunmetal #293241 ΔE 0.026
- Dark #1B2431 ΔE 0.032
- Jet #212529 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.056
- Onyx #343A40 ΔE 0.058
Use #252B39 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.