#373E33
Closest named color: Charcoal Grey (#3C4142). oklch(35.4% 0.021 134.1), rgb(55, 62, 51).
Aa
White text reads best on this color (11.05:1).
About this color
#373E33 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.027 away. White text reads best on it, at 11.05:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.89:1 |
| White text | 11.05:1 |
Values
| HEX | #373E33 |
| RGB | rgb(55, 62, 51) |
| HSL | hsl(98, 10%, 22%) |
| OKLCH | oklch(35.4% 0.021 134.1) |
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 #373E33 | 11.05:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #373E33 | 1.89:1 | Fails | Lc 8.3 | Not readable |
| #373E33 text on white | 11.05:1 | AAA | Lc 95.6 | Preferred for body text |
| #373E33 text on black | 1.89:1 | 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 900.
-
Step 50
50
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E8EAE7
oklch(93.5% 0.005 134.9)
-
Step 200
200
#D7DAD5
oklch(88.5% 0.007 132.4)
-
Step 300
300
#BCC3B9
oklch(80.9% 0.016 136.1)
-
Step 400
400
#9AA495
oklch(70.6% 0.024 135)
-
Step 500
500
#828E7B
oklch(63.1% 0.031 133.9)
-
Step 600
600
#6B7864
oklch(55.6% 0.034 134.6)
-
Step 700
700
#596552
oklch(49.1% 0.033 134)
-
Step 800
800
#495244
oklch(42.6% 0.025 134.3)
-
Step 900
900 (this color)
#373E33
oklch(35.4% 0.021 134.1)
-
Step 950
950
#242821
oklch(27% 0.014 131.7)
#373E33 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) | #3F3C32 | 0.014 |
| Deuteranopia (no green cones) | #3E3C33 | 0.013 |
| Tritanopia (no blue cones) | #373D3B | 0.015 |
| Achromatopsia (no color) | #3C3C3C | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373E33
#373E33
oklch(35.4% 0.021 134.1)
- #3F3843
#3F3843
oklch(35.2% 0.021 313.4)
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 #373E33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.027
- Onyx #343A40 ΔE 0.030
- Pakistan Green #283618 ΔE 0.053
- Charcoal #264653 ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.057
- Dark Olive #373E02 ΔE 0.059
- Gunmetal #293241 ΔE 0.059
- Dark Slate Gray #2F4F4F ΔE 0.060
Use #373E33 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.