#263B3D
Closest named color: Onyx (#343A40). oklch(33.6% 0.027 203.5), rgb(38, 59, 61).
Aa
White text reads best on this color (11.82:1).
About this color
#263B3D is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.022 away. White text reads best on it, at 11.82:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.77:1 |
| White text | 11.82:1 |
Values
| HEX | #263B3D |
| RGB | rgb(38, 59, 61) |
| HSL | hsl(185, 23%, 19%) |
| OKLCH | oklch(33.6% 0.027 203.5) |
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 #263B3D | 11.82:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #263B3D | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #263B3D text on white | 11.82:1 | AAA | Lc 97.1 | Preferred for body text |
| #263B3D text on black | 1.77:1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B2C5C6
oklch(80.9% 0.021 200.6)
-
Step 400
400
#8AA7AA
oklch(70.7% 0.032 204.2)
-
Step 500
500
#6C9195
oklch(63.1% 0.041 204.5)
-
Step 600
600
#547B7F
oklch(55.5% 0.044 204)
-
Step 700
700
#44686B
oklch(49.1% 0.041 202.5)
-
Step 800
800
#385557
oklch(42.7% 0.035 201.4)
-
Step 900
900 (this color)
#263B3D
oklch(33.6% 0.027 203.5)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#263B3D 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) | #38393D | 0.027 |
| Deuteranopia (no green cones) | #34363D | 0.025 |
| Tritanopia (no blue cones) | #1E3D3C | 0.012 |
| Achromatopsia (no color) | #373737 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263B3D
#263B3D
oklch(33.6% 0.027 203.5)
- #443230
#443230
oklch(33.7% 0.027 25.8)
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 #263B3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.029
- Gunmetal #293241 ΔE 0.034
- Midnight Green #073B4C ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.041
- Charcoal #264653 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.056
Use #263B3D 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.