#021C23
Closest named color: Rich Black (#0D1B2A). oklch(21% 0.035 218.3), rgb(2, 28, 35).
Aa
White text reads best on this color (17.60:1).
About this color
#021C23 is a very dark, muted teal or cyan. In OKLCH its lightness is 21%, its chroma 0.035 and its hue 218°. 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 17.60:1.
| Hue family | Teals and cyans |
| Lightness | very dark (21%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.60:1 |
Values
| HEX | #021C23 |
| RGB | rgb(2, 28, 35) |
| HSL | hsl(193, 89%, 7%) |
| OKLCH | oklch(21% 0.035 218.3) |
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 #021C23 | 17.60:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #021C23 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #021C23 text on white | 17.60:1 | AAA | Lc 104.3 | Preferred for body text |
| #021C23 text on black | 1.19:1 | 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
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#C9DDE3
oklch(88.4% 0.023 217.7)
-
Step 300
300
#A4C8D3
oklch(81% 0.041 218.3)
-
Step 400
400
#70ABBC
oklch(70.7% 0.066 217.9)
-
Step 500
500
#4596AC
oklch(63.2% 0.085 218.3)
-
Step 600
600
#1D8097
oklch(55.6% 0.092 217.8)
-
Step 700
700
#0A6C81
oklch(49.1% 0.086 218)
-
Step 800
800
#105869
oklch(42.7% 0.071 218.3)
-
Step 900
900
#184955
oklch(37.8% 0.055 217)
-
Step 950
950 (this color)
#021C23
oklch(21% 0.035 218.3)
#021C23 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) | #181B23 | 0.031 |
| Deuteranopia (no green cones) | #131723 | 0.028 |
| Tritanopia (no blue cones) | #001E1E | 0.015 |
| Achromatopsia (no color) | #191919 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #021C23
#021C23
oklch(21% 0.035 218.3)
- #26120C
#26120C
oklch(20.9% 0.035 37.5)
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 #021C23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Rich Navy #001219 ΔE 0.041
- Dark #1B2431 ΔE 0.053
- Jet #212529 ΔE 0.059
- Almost Black #070D0D ΔE 0.063
- Oxford Blue #1B263B ΔE 0.066
- Navy Blue #001146 ΔE 0.081
- Dark Navy #000435 ΔE 0.091
Use #021C23 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.