#0A212A
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.033 226.6), rgb(10, 33, 42).
Aa
White text reads best on this color (16.61:1).
About this color
#0A212A is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.033 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 16.61:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.61:1 |
Values
| HEX | #0A212A |
| RGB | rgb(10, 33, 42) |
| HSL | hsl(197, 62%, 10%) |
| OKLCH | oklch(23.4% 0.033 226.6) |
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 #0A212A | 16.61:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #0A212A | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #0A212A text on white | 16.61:1 | AAA | Lc 103.5 | Preferred for body text |
| #0A212A text on black | 1.26:1 | 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 950.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A7C6D5
oklch(80.9% 0.04 228.7)
-
Step 400
400
#76A9BF
oklch(70.7% 0.063 226.7)
-
Step 500
500
#4F94AF
oklch(63.2% 0.081 225.8)
-
Step 600
600
#2E7D9B
oklch(55.5% 0.088 227)
-
Step 700
700
#206A84
oklch(49.2% 0.081 225.9)
-
Step 800
800
#1D566C
oklch(42.6% 0.068 227.5)
-
Step 900
900
#1F4757
oklch(37.6% 0.052 226.9)
-
Step 950
950 (this color)
#0A212A
oklch(23.4% 0.033 226.6)
#0A212A 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) | #1C202A | 0.025 |
| Deuteranopia (no green cones) | #181D2A | 0.022 |
| Tritanopia (no blue cones) | #002424 | 0.021 |
| Achromatopsia (no color) | #1E1E1E | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A212A
#0A212A
oklch(23.4% 0.033 226.6)
- #2B1910
#2B1910
oklch(23.5% 0.033 47.2)
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 #0A212A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Dark #1B2431 ΔE 0.029
- Jet #212529 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.043
- Rich Navy #001219 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.078
- Navy Blue #001146 ΔE 0.081
- Gunmetal #293241 ΔE 0.083
Use #0A212A 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.