#37474A
Closest named color: Charcoal Grey (#3C4142). oklch(38.5% 0.021 210.3), rgb(55, 71, 74).
Aa
White text reads best on this color (9.71:1).
About this color
#37474A is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.020 away. White text reads best on it, at 9.71:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.16:1 |
| White text | 9.71:1 |
Values
| HEX | #37474A |
| RGB | rgb(55, 71, 74) |
| HSL | hsl(189, 15%, 25%) |
| OKLCH | oklch(38.5% 0.021 210.3) |
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 #37474A | 9.71:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #37474A | 2.16:1 | Fails | Lc 11.4 | Not readable |
| #37474A text on white | 9.71:1 | AAA | Lc 92.5 | Preferred for body text |
| #37474A text on black | 2.16:1 | Fails | Lc -9.9 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EBEB
oklch(93.7% 0.004 197.1)
-
Step 200
200
#D3DBDC
oklch(88.6% 0.009 205.9)
-
Step 300
300
#B6C4C6
oklch(81% 0.016 207.1)
-
Step 400
400
#8FA5A9
oklch(70.6% 0.025 209.8)
-
Step 500
500
#748F94
oklch(63.1% 0.031 210.1)
-
Step 600
600
#5C797F
oklch(55.6% 0.035 211.7)
-
Step 700
700
#4B666B
oklch(49.1% 0.033 210.2)
-
Step 800
800
#3E5357
oklch(42.6% 0.027 210.5)
-
Step 900
900 (this color)
#37474A
oklch(38.5% 0.021 210.3)
-
Step 950
950
#1F282A
oklch(26.9% 0.013 212.7)
#37474A 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) | #44464A | 0.020 |
| Deuteranopia (no green cones) | #41434A | 0.019 |
| Tritanopia (no blue cones) | #314948 | 0.011 |
| Achromatopsia (no color) | #444444 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37474A
#37474A
oklch(38.5% 0.021 210.3)
- #4E403D
#4E403D
oklch(38.5% 0.02 32.1)
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 #37474A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.020
- Dark Slate Gray #2F4F4F ΔE 0.025
- Charcoal #264653 ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.034
- Onyx #343A40 ΔE 0.042
- Dark Teal #014D4E ΔE 0.045
- Dark Blue Green #005249 ΔE 0.053
- Deep Teal #00555A ΔE 0.054
Use #37474A 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.