#21544D
Closest named color: Dark Blue Green (#005249). oklch(40.9% 0.056 183.2), rgb(33, 84, 77).
Aa
White text reads best on this color (8.60:1).
About this color
#21544D is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.056 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.021 away. White text reads best on it, at 8.60:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.43:1 |
| White text | 8.60:1 |
Values
| HEX | #21544D |
| RGB | rgb(33, 84, 77) |
| HSL | hsl(172, 44%, 23%) |
| OKLCH | oklch(40.9% 0.056 183.2) |
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 #21544D | 8.60:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #21544D | 2.43:1 | Fails | Lc 14.6 | Not readable |
| #21544D text on white | 8.60:1 | AAA | Lc 89.4 | Fine for body text |
| #21544D text on black | 2.43:1 | Fails | Lc -12.9 | 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 800.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CDDDDA
oklch(88.5% 0.018 183.5)
-
Step 300
300
#AAC8C2
oklch(80.9% 0.033 182)
-
Step 400
400
#7CACA4
oklch(70.8% 0.053 183.4)
-
Step 500
500
#58978D
oklch(63.1% 0.067 182.8)
-
Step 600
600
#3B8177
oklch(55.5% 0.072 183)
-
Step 700
700
#2D6D64
oklch(49% 0.067 182.9)
-
Step 800
800 (this color)
#21544D
oklch(40.9% 0.056 183.2)
-
Step 900
900
#254944
oklch(37.7% 0.043 184.1)
-
Step 950
950
#162B28
oklch(27% 0.028 184.2)
#21544D 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) | #504F4D | 0.060 |
| Deuteranopia (no green cones) | #48494E | 0.057 |
| Tritanopia (no blue cones) | #005652 | 0.016 |
| Achromatopsia (no color) | #4C4C4C | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21544D
#21544D
oklch(40.9% 0.056 183.2)
- #643D47
#643D47
oklch(40.9% 0.056 3.2)
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 #21544D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.021
- Dark Slate Gray #2F4F4F ΔE 0.022
- Deep Teal #00555A ΔE 0.024
- Dark Teal #014D4E ΔE 0.032
- Dark Green Blue #1F6357 ΔE 0.047
- Petrol #005F6A ΔE 0.050
- Charcoal #264653 ΔE 0.051
- Pine #2B5D34 ΔE 0.057
Use #21544D 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.