#37474D
Closest named color: Charcoal Grey (#3C4142). oklch(38.6% 0.023 222.7), rgb(55, 71, 77).
Aa
White text reads best on this color (9.67:1).
About this color
#37474D is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.022 away. White text reads best on it, at 9.67:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.17:1 |
| White text | 9.67:1 |
Values
| HEX | #37474D |
| RGB | rgb(55, 71, 77) |
| HSL | hsl(196, 17%, 26%) |
| OKLCH | oklch(38.6% 0.023 222.7) |
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 #37474D | 9.67:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #37474D | 2.17:1 | Fails | Lc 11.5 | Not readable |
| #37474D text on white | 9.67:1 | AAA | Lc 92.4 | Preferred for body text |
| #37474D text on black | 2.17:1 | Fails | Lc -10.0 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D3DBDE
oklch(88.6% 0.01 222.1)
-
Step 300
300
#B5C3C9
oklch(80.8% 0.018 225.2)
-
Step 400
400
#8FA5AD
oklch(70.8% 0.027 221.7)
-
Step 500
500
#738F99
oklch(63.2% 0.035 221.6)
-
Step 600
600
#5B7984
oklch(55.7% 0.038 222.4)
-
Step 700
700
#4B656F
oklch(49% 0.035 223.6)
-
Step 800
800
#3E535B
oklch(42.8% 0.029 223.3)
-
Step 900
900 (this color)
#37474D
oklch(38.6% 0.023 222.7)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#37474D 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) | #43464D | 0.018 |
| Deuteranopia (no green cones) | #40434D | 0.018 |
| Tritanopia (no blue cones) | #304949 | 0.015 |
| Achromatopsia (no color) | #444444 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37474D
#37474D
oklch(38.6% 0.023 222.7)
- #4F403B
#4F403B
oklch(38.6% 0.023 39.3)
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 #37474D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.022
- Charcoal #264653 ΔE 0.024
- Dark Slate Gray #2F4F4F ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.030
- Onyx #343A40 ΔE 0.043
- Dark Teal #014D4E ΔE 0.046
- Deep Teal #00555A ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.054
Use #37474D 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.