#37423B
Closest named color: Charcoal Grey (#3C4142). oklch(36.7% 0.019 157.4), rgb(55, 66, 59).
Aa
White text reads best on this color (10.47:1).
About this color
#37423B is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.016 away. White text reads best on it, at 10.47:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #37423B |
| RGB | rgb(55, 66, 59) |
| HSL | hsl(142, 9%, 24%) |
| OKLCH | oklch(36.7% 0.019 157.4) |
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 #37423B | 10.47:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #37423B | 2.00:1 | Fails | Lc 9.6 | Not readable |
| #37423B text on white | 10.47:1 | AAA | Lc 94.3 | Preferred for body text |
| #37423B text on black | 2.00:1 | Fails | Lc -8.3 | 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
#E8EBE9
oklch(93.7% 0.004 157.2)
-
Step 200
200
#D5DBD7
oklch(88.6% 0.008 157.1)
-
Step 300
300
#BAC3BD
oklch(80.8% 0.013 156.9)
-
Step 400
400
#96A59B
oklch(70.7% 0.022 156.6)
-
Step 500
500
#7C8F83
oklch(63.1% 0.028 157.8)
-
Step 600
600
#65796C
oklch(55.6% 0.031 156.8)
-
Step 700
700
#53665A
oklch(49.1% 0.03 157.4)
-
Step 800
800
#44534A
oklch(42.6% 0.024 158.9)
-
Step 900
900 (this color)
#37423B
oklch(36.7% 0.019 157.4)
-
Step 950
950
#222824
oklch(26.9% 0.011 156.4)
#37423B 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) | #42403B | 0.018 |
| Deuteranopia (no green cones) | #403F3B | 0.017 |
| Tritanopia (no blue cones) | #354240 | 0.009 |
| Achromatopsia (no color) | #3F3F3F | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37423B
#37423B
oklch(36.7% 0.019 157.4)
- #463B42
#463B42
oklch(36.6% 0.019 339.7)
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 #37423B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.016
- Onyx #343A40 ΔE 0.032
- Charcoal #264653 ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.044
- Dark Teal #014D4E ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Blue Green #005249 ΔE 0.060
Use #37423B 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.