#374640
Closest named color: Charcoal Grey (#3C4142). oklch(37.9% 0.022 168.9), rgb(55, 70, 64).
Aa
White text reads best on this color (9.94:1).
About this color
#374640 is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.019 away. White text reads best on it, at 9.94:1.
| Hue family | Neutrals |
| Lightness | dark (38%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.11:1 |
| White text | 9.94:1 |
Values
| HEX | #374640 |
| RGB | rgb(55, 70, 64) |
| HSL | hsl(156, 12%, 25%) |
| OKLCH | oklch(37.9% 0.022 168.9) |
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 #374640 | 9.94:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #374640 | 2.11:1 | Fails | Lc 10.9 | Not readable |
| #374640 text on white | 9.94:1 | AAA | Lc 93.1 | Preferred for body text |
| #374640 text on black | 2.11:1 | Fails | Lc -9.4 | 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
#D4DBD8
oklch(88.5% 0.009 168.7)
-
Step 300
300
#B7C4BF
oklch(80.9% 0.016 170.9)
-
Step 400
400
#91A69E
oklch(70.6% 0.026 170.6)
-
Step 500
500
#769086
oklch(63% 0.033 169.9)
-
Step 600
600
#5F7A70
oklch(55.5% 0.035 170.4)
-
Step 700
700
#4E675D
oklch(49% 0.034 168.5)
-
Step 800
800
#40544C
oklch(42.6% 0.028 168.6)
-
Step 900
900 (this color)
#374640
oklch(37.9% 0.022 168.9)
-
Step 950
950
#202925
oklch(27.1% 0.015 166.5)
#374640 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) | #454440 | 0.022 |
| Deuteranopia (no green cones) | #424240 | 0.020 |
| Tritanopia (no blue cones) | #344644 | 0.008 |
| Achromatopsia (no color) | #434343 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374640
#374640
oklch(37.9% 0.022 168.9)
- #4B3E44
#4B3E44
oklch(38% 0.02 348.6)
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 #374640, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.019
- Dark Slate Gray #2F4F4F ΔE 0.032
- Charcoal #264653 ΔE 0.037
- Onyx #343A40 ΔE 0.041
- Dark Teal #014D4E ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.048
- Dark Blue Green #005249 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.060
Use #374640 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.