#03212B
Closest named color: Rich Black (#0D1B2A). oklch(23.1% 0.04 224), rgb(3, 33, 43).
Aa
White text reads best on this color (16.71:1).
About this color
#03212B is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.040 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 16.71:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.71:1 |
Values
| HEX | #03212B |
| RGB | rgb(3, 33, 43) |
| HSL | hsl(195, 87%, 9%) |
| OKLCH | oklch(23.1% 0.04 224) |
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 #03212B | 16.71:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #03212B | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #03212B text on white | 16.71:1 | AAA | Lc 103.5 | Preferred for body text |
| #03212B text on black | 1.25:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A0C8D7
oklch(80.9% 0.047 222.7)
-
Step 400
400
#6AABC4
oklch(70.7% 0.076 224.6)
-
Step 500
500
#3A96B5
oklch(63.2% 0.097 224)
-
Step 600
600
#0080A0
oklch(55.7% 0.104 223.4)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#11485A
oklch(37.6% 0.063 224.5)
-
Step 950
950 (this color)
#03212B
oklch(23.1% 0.04 224)
#03212B 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) | #1B202C | 0.031 |
| Deuteranopia (no green cones) | #161C2B | 0.028 |
| Tritanopia (no blue cones) | #002424 | 0.021 |
| Achromatopsia (no color) | #1E1E1E | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03212B
#03212B
oklch(23.1% 0.04 224)
- #2D170D
#2D170D
oklch(23.3% 0.04 44.8)
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 #03212B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.035
- Jet #212529 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.047
- Rich Navy #001219 ΔE 0.063
- Navy Blue #001146 ΔE 0.078
- Space Cadet #2B2D42 ΔE 0.082
- Almost Black #070D0D ΔE 0.085
Use #03212B 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.