#252A39
Closest named color: Space Cadet (#2B2D42). oklch(28.7% 0.029 270.2), rgb(37, 42, 57).
Aa
White text reads best on this color (14.29:1).
About this color
#252A39 is a dark close to neutral grey. In OKLCH its lightness is 29%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Space Cadet (#2B2D42), ΔE 0.021 away. White text reads best on it, at 14.29:1.
| Hue family | Neutrals |
| Lightness | dark (29%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Space Cadet (#2B2D42) |
| Black text | 1.46:1 |
| White text | 14.29:1 |
Values
| HEX | #252A39 |
| RGB | rgb(37, 42, 57) |
| HSL | hsl(225, 21%, 18%) |
| OKLCH | oklch(28.7% 0.029 270.2) |
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 #252A39 | 14.29:1 | AAA | Lc -104.0 | Preferred for body text |
| Black text on #252A39 | 1.46:1 | Fails | Lc 0.0 | Not readable |
| #252A39 text on white | 14.29:1 | AAA | Lc 101.0 | Preferred for body text |
| #252A39 text on black | 1.46:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E6
oklch(88.5% 0.019 269.1)
-
Step 300
300
#B8C0D7
oklch(80.9% 0.034 270.4)
-
Step 400
400
#93A0C3
oklch(70.8% 0.053 269)
-
Step 500
500
#7988B4
oklch(63.1% 0.069 269.8)
-
Step 600
600
#6271A0
oklch(55.6% 0.076 270.2)
-
Step 700
700
#515F89
oklch(49.2% 0.07 269.6)
-
Step 800
800
#434D6F
oklch(42.6% 0.058 271.2)
-
Step 900
900
#38405A
oklch(37.6% 0.046 270.9)
-
Step 950
950 (this color)
#252A39
oklch(28.7% 0.029 270.2)
#252A39 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) | #252B3A | 0.003 |
| Deuteranopia (no green cones) | #242A39 | 0.002 |
| Tritanopia (no blue cones) | #202D2F | 0.026 |
| Achromatopsia (no color) | #2A2A2A | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252A39
#252A39
oklch(28.7% 0.029 270.2)
- #302A1A
#302A1A
oklch(28.7% 0.028 89.8)
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 #252A39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Space Cadet #2B2D42 ΔE 0.021
- Oxford Blue #1B263B ΔE 0.023
- Gunmetal #293241 ΔE 0.029
- Dark #1B2431 ΔE 0.030
- Jet #212529 ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.058
- Midnight Green #073B4C ΔE 0.060
Use #252A39 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.