#37443C
Closest named color: Charcoal Grey (#3C4142). oklch(37.2% 0.022 158.2), rgb(55, 68, 60).
Aa
White text reads best on this color (10.22:1).
About this color
#37443C is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.018 away. White text reads best on it, at 10.22:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.05:1 |
| White text | 10.22:1 |
Values
| HEX | #37443C |
| RGB | rgb(55, 68, 60) |
| HSL | hsl(143, 11%, 24%) |
| OKLCH | oklch(37.2% 0.022 158.2) |
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 #37443C | 10.22:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #37443C | 2.05:1 | Fails | Lc 10.2 | Not readable |
| #37443C text on white | 10.22:1 | AAA | Lc 93.7 | Preferred for body text |
| #37443C text on black | 2.05:1 | Fails | Lc -8.8 | 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
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D4DBD7
oklch(88.5% 0.009 161.3)
-
Step 300
300
#B8C4BD
oklch(80.9% 0.016 160.5)
-
Step 400
400
#94A69A
oklch(70.8% 0.027 156.5)
-
Step 500
500
#799082
oklch(63.1% 0.034 158.6)
-
Step 600
600
#627A6B
oklch(55.6% 0.036 157.6)
-
Step 700
700
#51675A
oklch(49.2% 0.034 159)
-
Step 800
800
#425449
oklch(42.7% 0.029 158.1)
-
Step 900
900 (this color)
#37443C
oklch(37.2% 0.022 158.2)
-
Step 950
950
#212924
oklch(27.1% 0.015 157.9)
#37443C 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) | #44423C | 0.021 |
| Deuteranopia (no green cones) | #41403C | 0.020 |
| Tritanopia (no blue cones) | #354442 | 0.010 |
| Achromatopsia (no color) | #414141 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37443C
#37443C
oklch(37.2% 0.022 158.2)
- #483C44
#483C44
oklch(37.2% 0.021 338.4)
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 #37443C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.018
- Onyx #343A40 ΔE 0.037
- Dark Slate Gray #2F4F4F ΔE 0.039
- Charcoal #264653 ΔE 0.041
- Dark Teal #014D4E ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.053
- Dark Blue Green #005249 ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.059
Use #37443C 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.