#37413B
Closest named color: Charcoal Grey (#3C4142). oklch(36.4% 0.017 159.1), rgb(55, 65, 59).
Aa
White text reads best on this color (10.59:1).
About this color
#37413B is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.015 away. White text reads best on it, at 10.59:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.98:1 |
| White text | 10.59:1 |
Values
| HEX | #37413B |
| RGB | rgb(55, 65, 59) |
| HSL | hsl(144, 8%, 24%) |
| OKLCH | oklch(36.4% 0.017 159.1) |
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 #37413B | 10.59:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #37413B | 1.98:1 | Fails | Lc 9.3 | Not readable |
| #37413B text on white | 10.59:1 | AAA | Lc 94.6 | Preferred for body text |
| #37413B text on black | 1.98:1 | Fails | Lc -8.0 | 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 900.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E8EAE9
oklch(93.5% 0.003 165.1)
-
Step 200
200
#D5DAD7
oklch(88.4% 0.007 160.1)
-
Step 300
300
#BAC3BE
oklch(80.9% 0.012 162)
-
Step 400
400
#97A59C
oklch(70.8% 0.02 157.7)
-
Step 500
500
#7D8E84
oklch(63% 0.025 159.8)
-
Step 600
600
#66796D
oklch(55.7% 0.029 157.6)
-
Step 700
700
#55655B
oklch(49% 0.025 157.9)
-
Step 800
800
#45534B
oklch(42.7% 0.022 160.3)
-
Step 900
900 (this color)
#37413B
oklch(36.4% 0.017 159.1)
-
Step 950
950
#222825
oklch(27% 0.01 164.1)
#37413B 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) | #413F3B | 0.017 |
| Deuteranopia (no green cones) | #3F3E3B | 0.015 |
| Tritanopia (no blue cones) | #35413F | 0.007 |
| Achromatopsia (no color) | #3F3F3F | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37413B
#37413B
oklch(36.4% 0.017 159.1)
- #443B41
#443B41
oklch(36.4% 0.016 338.1)
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 #37413B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.015
- Onyx #343A40 ΔE 0.028
- Charcoal #264653 ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.053
- Dark Teal #014D4E ΔE 0.055
- Gunmetal #293241 ΔE 0.061
Use #37413B 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.