#0A4451
Closest named color: Charcoal (#264653). oklch(35.8% 0.059 217.3), rgb(10, 68, 81).
Aa
White text reads best on this color (10.72:1).
About this color
#0A4451 is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.059 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.025 away. White text reads best on it, at 10.72:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.95:1 |
| White text | 10.72:1 |
Values
| HEX | #0A4451 |
| RGB | rgb(10, 68, 81) |
| HSL | hsl(191, 78%, 18%) |
| OKLCH | oklch(35.8% 0.059 217.3) |
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 #0A4451 | 10.72:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #0A4451 | 1.95:1 | Fails | Lc 9.4 | Not readable |
| #0A4451 text on white | 10.72:1 | AAA | Lc 94.5 | Preferred for body text |
| #0A4451 text on black | 1.95:1 | Fails | Lc -8.1 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE4
oklch(88.6% 0.025 215.9)
-
Step 300
300
#A1C8D4
oklch(80.9% 0.045 218.5)
-
Step 400
400
#6BACBE
oklch(70.7% 0.071 217.4)
-
Step 500
500
#3C97AE
oklch(63.2% 0.091 217.5)
-
Step 600
600
#028199
oklch(55.6% 0.099 217)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900 (this color)
#0A4451
oklch(35.8% 0.059 217.3)
-
Step 950
950
#0D2B32
oklch(27% 0.037 215.6)
#0A4451 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) | #3B4252 | 0.051 |
| Deuteranopia (no green cones) | #323B51 | 0.046 |
| Tritanopia (no blue cones) | #004948 | 0.027 |
| Achromatopsia (no color) | #3E3E3E | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A4451
#0A4451
oklch(35.8% 0.059 217.3)
- #573126
#573126
oklch(35.8% 0.059 36.9)
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 #0A4451, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.030
- Midnight Green #073B4C ΔE 0.030
- Dark Teal #014D4E ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.033
- Onyx #343A40 ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.053
- Dark Blue Green #005249 ΔE 0.054
Use #0A4451 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.