#374B42
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.3% 0.029 165.6), rgb(55, 75, 66).
Aa
White text reads best on this color (9.34:1).
About this color
#374B42 is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.022 away. White text reads best on it, at 9.34:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #374B42 |
| RGB | rgb(55, 75, 66) |
| HSL | hsl(153, 15%, 25%) |
| OKLCH | oklch(39.3% 0.029 165.6) |
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 #374B42 | 9.34:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #374B42 | 2.24:1 | Fails | Lc 12.4 | Not readable |
| #374B42 text on white | 9.34:1 | AAA | Lc 91.6 | Preferred for body text |
| #374B42 text on black | 2.24:1 | Fails | Lc -10.8 | 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
#E6EBE9
oklch(93.6% 0.006 170.4)
-
Step 200
200
#D2DCD7
oklch(88.5% 0.013 164.8)
-
Step 300
300
#B4C5BD
oklch(80.8% 0.022 166)
-
Step 400
400
#8DA89B
oklch(70.7% 0.035 164.7)
-
Step 500
500
#709383
oklch(63.2% 0.046 165.2)
-
Step 600
600
#587D6C
oklch(55.7% 0.05 164.6)
-
Step 700
700
#48695B
oklch(49.1% 0.044 166.4)
-
Step 800
800
#3B564A
oklch(42.8% 0.038 165.3)
-
Step 900
900 (this color)
#374B42
oklch(39.3% 0.029 165.6)
-
Step 950
950
#1E2924
oklch(26.9% 0.018 165.6)
#374B42 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) | #4A4842 | 0.030 |
| Deuteranopia (no green cones) | #474643 | 0.028 |
| Tritanopia (no blue cones) | #334B48 | 0.011 |
| Achromatopsia (no color) | #474747 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374B42
#374B42
oklch(39.3% 0.029 165.6)
- #524049
#524049
oklch(39.4% 0.029 346.9)
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 #374B42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.022
- Charcoal Grey #3C4142 ΔE 0.033
- Charcoal #264653 ΔE 0.043
- Dark Blue Green #005249 ΔE 0.043
- Dark Teal #014D4E ΔE 0.044
- Deep Teal #00555A ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.053
- Onyx #343A40 ΔE 0.057
Use #374B42 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.