#253737
Closest named color: Gunmetal (#293241). oklch(32.1% 0.023 196.1), rgb(37, 55, 55).
Aa
White text reads best on this color (12.49:1).
About this color
#253737 is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.029 away. White text reads best on it, at 12.49:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.68:1 |
| White text | 12.49:1 |
Values
| HEX | #253737 |
| RGB | rgb(37, 55, 55) |
| HSL | hsl(180, 20%, 18%) |
| OKLCH | oklch(32.1% 0.023 196.1) |
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 #253737 | 12.49:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #253737 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #253737 text on white | 12.49:1 | AAA | Lc 98.4 | Preferred for body text |
| #253737 text on black | 1.68:1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEB
oklch(93.7% 0.009 188.1)
-
Step 200
200
#CEDCDC
oklch(88.4% 0.015 196.9)
-
Step 300
300
#ADC6C6
oklch(80.8% 0.027 196.6)
-
Step 400
400
#81AAAA
oklch(70.8% 0.044 196.2)
-
Step 500
500
#5F9495
oklch(63% 0.056 197.3)
-
Step 600
600
#447F7F
oklch(55.7% 0.062 195.5)
-
Step 700
700
#356B6B
oklch(49.1% 0.057 195.4)
-
Step 800
800
#2D5757
oklch(42.7% 0.047 195.5)
-
Step 900
900
#294848
oklch(37.8% 0.037 195.7)
-
Step 950
950 (this color)
#253737
oklch(32.1% 0.023 196.1)
#253737 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) | #353537 | 0.025 |
| Deuteranopia (no green cones) | #313337 | 0.022 |
| Tritanopia (no blue cones) | #1F3837 | 0.008 |
| Achromatopsia (no color) | #343434 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #253737
#253737
oklch(32.1% 0.023 196.1)
- #3E2E2F
#3E2E2F
oklch(32% 0.024 14.3)
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 #253737, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.029
- Onyx #343A40 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.038
- Midnight Green #073B4C ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.045
- Pakistan Green #283618 ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.052
- Charcoal #264653 ΔE 0.060
Use #253737 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.