#37394A
Closest named color: Onyx (#343A40). oklch(35% 0.03 279.5), rgb(55, 57, 74).
Aa
White text reads best on this color (11.37:1).
About this color
#37394A is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.020 away. White text reads best on it, at 11.37:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.84:1 |
| White text | 11.37:1 |
Values
| HEX | #37394A |
| RGB | rgb(55, 57, 74) |
| HSL | hsl(234, 15%, 25%) |
| OKLCH | oklch(35% 0.03 279.5) |
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 #37394A | 11.37:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #37394A | 1.84:1 | Fails | Lc 7.6 | Not readable |
| #37394A text on white | 11.37:1 | AAA | Lc 96.2 | Preferred for body text |
| #37394A text on black | 1.84:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EE
oklch(93.5% 0.007 286.3)
-
Step 200
200
#D7D8E1
oklch(88.4% 0.012 281.1)
-
Step 300
300
#BDBFCF
oklch(80.8% 0.022 280.2)
-
Step 400
400
#9B9FB7
oklch(70.7% 0.035 278)
-
Step 500
500
#8387A5
oklch(63.1% 0.045 279.1)
-
Step 600
600
#6D7190
oklch(55.7% 0.048 279)
-
Step 700
700
#5B5E7B
oklch(49.1% 0.046 279.9)
-
Step 800
800
#4A4D64
oklch(42.7% 0.038 278.8)
-
Step 900
900 (this color)
#37394A
oklch(35% 0.03 279.5)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#37394A 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) | #343B4B | 0.007 |
| Deuteranopia (no green cones) | #33394A | 0.006 |
| Tritanopia (no blue cones) | #333C3F | 0.026 |
| Achromatopsia (no color) | #3A3A3A | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37394A
#37394A
oklch(35% 0.03 279.5)
- #3E3B29
#3E3B29
oklch(35% 0.03 99.8)
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 #37394A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.035
- Gunmetal #293241 ΔE 0.036
- Charcoal #264653 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.047
Use #37394A 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.