#263C43
Closest named color: Onyx (#343A40). oklch(34.1% 0.03 219.8), rgb(38, 60, 67).
Aa
White text reads best on this color (11.60:1).
About this color
#263C43 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.030 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.020 away. White text reads best on it, at 11.60:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.80:1 |
| White text | 11.60:1 |
Values
| HEX | #263C43 |
| RGB | rgb(38, 60, 67) |
| HSL | hsl(194, 28%, 21%) |
| OKLCH | oklch(34.1% 0.03 219.8) |
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 #263C43 | 11.60:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #263C43 | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #263C43 text on white | 11.60:1 | AAA | Lc 96.7 | Preferred for body text |
| #263C43 text on black | 1.80:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D1DBDF
oklch(88.5% 0.012 223.5)
-
Step 300
300
#B1C4CB
oklch(80.8% 0.023 221.9)
-
Step 400
400
#88A6B0
oklch(70.6% 0.036 220.1)
-
Step 500
500
#6A919D
oklch(63.2% 0.047 218.8)
-
Step 600
600
#517B88
oklch(55.7% 0.051 219.3)
-
Step 700
700
#416773
oklch(49% 0.047 219.9)
-
Step 800
800
#36545E
oklch(42.6% 0.039 220.9)
-
Step 900
900 (this color)
#263C43
oklch(34.1% 0.03 219.8)
-
Step 950
950
#1C292D
oklch(27.1% 0.019 218.7)
#263C43 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) | #383B43 | 0.026 |
| Deuteranopia (no green cones) | #333743 | 0.024 |
| Tritanopia (no blue cones) | #1B3E3E | 0.018 |
| Achromatopsia (no color) | #393939 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #263C43
#263C43
oklch(34.1% 0.03 219.8)
- #46332C
#46332C
oklch(34.1% 0.03 41.1)
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 #263C43, 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 0.020
- Midnight Green #073B4C ΔE 0.031
- Gunmetal #293241 ΔE 0.033
- Charcoal #264653 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.049
Use #263C43 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.