#39404A
Closest named color: Charcoal Grey (#3C4142). oklch(36.9% 0.02 257.3), rgb(57, 64, 74).
Aa
White text reads best on this color (10.46:1).
About this color
#39404A is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.016 away. White text reads best on it, at 10.46:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.00:1 |
| White text | 10.46:1 |
Values
| HEX | #39404A |
| RGB | rgb(57, 64, 74) |
| HSL | hsl(215, 13%, 26%) |
| OKLCH | oklch(36.9% 0.02 257.3) |
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 #39404A | 10.46:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #39404A | 2.00:1 | Fails | Lc 9.6 | Not readable |
| #39404A text on white | 10.46:1 | AAA | Lc 94.3 | Preferred for body text |
| #39404A text on black | 2.00:1 | Fails | Lc -8.3 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D6D9DF
oklch(88.5% 0.009 264.5)
-
Step 300
300
#BBC1CA
oklch(80.9% 0.014 258.4)
-
Step 400
400
#98A1B0
oklch(70.7% 0.024 260.7)
-
Step 500
500
#7E8A9C
oklch(63% 0.031 258.4)
-
Step 600
600
#677487
oklch(55.5% 0.033 257.8)
-
Step 700
700
#566272
oklch(49.2% 0.03 255.7)
-
Step 800
800
#46505D
oklch(42.7% 0.025 255.1)
-
Step 900
900 (this color)
#39404A
oklch(36.9% 0.02 257.3)
-
Step 950
950
#23272D
oklch(27.1% 0.013 258.4)
#39404A 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) | #3D404A | 0.006 |
| Deuteranopia (no green cones) | #3B3F4A | 0.004 |
| Tritanopia (no blue cones) | #354243 | 0.017 |
| Achromatopsia (no color) | #3F3F3F | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39404A
#39404A
oklch(36.9% 0.02 257.3)
- #453E34
#453E34
oklch(36.8% 0.019 76.8)
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 #39404A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.016
- Onyx #343A40 ΔE 0.025
- Charcoal #264653 ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.048
- Gunmetal #293241 ΔE 0.055
- Midnight Green #073B4C ΔE 0.059
Use #39404A 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.