#253237
Closest named color: Gunmetal (#293241). oklch(30.7% 0.02 223.4), rgb(37, 50, 55).
Aa
White text reads best on this color (13.20:1).
About this color
#253237 is a dark close to neutral grey. In OKLCH its lightness is 31%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.020 away. White text reads best on it, at 13.20:1.
| Hue family | Neutrals |
| Lightness | dark (31%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.59:1 |
| White text | 13.20:1 |
Values
| HEX | #253237 |
| RGB | rgb(37, 50, 55) |
| HSL | hsl(197, 20%, 18%) |
| OKLCH | oklch(30.7% 0.02 223.4) |
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 #253237 | 13.20:1 | AAA | Lc -102.7 | Preferred for body text |
| Black text on #253237 | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #253237 text on white | 13.20:1 | AAA | Lc 99.5 | Preferred for body text |
| #253237 text on black | 1.59:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D1DBDF
oklch(88.5% 0.012 223.5)
-
Step 300
300
#B1C4CC
oklch(80.8% 0.024 224.9)
-
Step 400
400
#88A6B2
oklch(70.7% 0.037 224.1)
-
Step 500
500
#6A909F
oklch(63.1% 0.048 224.3)
-
Step 600
600
#517A8A
oklch(55.5% 0.052 224.5)
-
Step 700
700
#416775
oklch(49.1% 0.049 223.3)
-
Step 800
800
#36545F
oklch(42.7% 0.04 223)
-
Step 900
900
#2F454E
oklch(37.6% 0.031 225.3)
-
Step 950
950 (this color)
#253237
oklch(30.7% 0.02 223.4)
#253237 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) | #2F3137 | 0.016 |
| Deuteranopia (no green cones) | #2C2F37 | 0.014 |
| Tritanopia (no blue cones) | #1F3434 | 0.013 |
| Achromatopsia (no color) | #303030 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253237
#253237
oklch(30.7% 0.02 223.4)
- #392D28
#392D28
oklch(30.9% 0.02 43.8)
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 #253237, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.020
- Space Cadet #2B2D42 ΔE 0.032
- Onyx #343A40 ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.042
- Midnight Green #073B4C ΔE 0.045
- Jet #212529 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.049
- Dark #1B2431 ΔE 0.052
Use #253237 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.