#21444B
Closest named color: Charcoal (#264653). oklch(36.4% 0.042 212.1), rgb(33, 68, 75).
Aa
White text reads best on this color (10.53:1).
About this color
#21444B is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.042 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.016 away. White text reads best on it, at 10.53:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.99:1 |
| White text | 10.53:1 |
Values
| HEX | #21444B |
| RGB | rgb(33, 68, 75) |
| HSL | hsl(190, 39%, 21%) |
| OKLCH | oklch(36.4% 0.042 212.1) |
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 #21444B | 10.53:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #21444B | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #21444B text on white | 10.53:1 | AAA | Lc 94.3 | Preferred for body text |
| #21444B text on black | 1.99:1 | Fails | Lc -8.2 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CDDCE0
oklch(88.4% 0.017 215.5)
-
Step 300
300
#AAC6CD
oklch(80.8% 0.032 214.5)
-
Step 400
400
#7CA9B3
oklch(70.6% 0.05 212.9)
-
Step 500
500
#5894A0
oklch(63% 0.065 211.8)
-
Step 600
600
#3C7E8B
oklch(55.5% 0.07 212.2)
-
Step 700
700
#2D6B76
oklch(49.2% 0.065 210.9)
-
Step 800
800
#275760
oklch(42.7% 0.054 211.5)
-
Step 900
900 (this color)
#21444B
oklch(36.4% 0.042 212.1)
-
Step 950
950
#162A2E
oklch(27% 0.027 211.7)
#21444B 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) | #3E424B | 0.038 |
| Deuteranopia (no green cones) | #383D4B | 0.036 |
| Tritanopia (no blue cones) | #074746 | 0.024 |
| Achromatopsia (no color) | #3F3F3F | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21444B
#21444B
oklch(36.4% 0.042 212.1)
- #523630
#523630
oklch(36.4% 0.042 32.5)
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 #21444B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.016
- Dark Grey Blue #29465B ΔE 0.030
- Dark Teal #014D4E ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.036
- Onyx #343A40 ΔE 0.037
- Midnight Green #073B4C ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.041
Use #21444B 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.