#21544F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41% 0.055 186.6), rgb(33, 84, 79).
Aa
White text reads best on this color (8.58:1).
About this color
#21544F is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.055 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 8.58:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.44:1 |
| White text | 8.58:1 |
Values
| HEX | #21544F |
| RGB | rgb(33, 84, 79) |
| HSL | hsl(174, 44%, 23%) |
| OKLCH | oklch(41% 0.055 186.6) |
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 #21544F | 8.58:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #21544F | 2.44:1 | Fails | Lc 14.7 | Not readable |
| #21544F text on white | 8.58:1 | AAA | Lc 89.3 | Fine for body text |
| #21544F text on black | 2.44:1 | 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
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CDDDDB
oklch(88.5% 0.017 187.8)
-
Step 300
300
#AAC8C4
oklch(80.9% 0.033 186.7)
-
Step 400
400
#7CABA6
oklch(70.6% 0.051 187.9)
-
Step 500
500
#589790
oklch(63.2% 0.066 186.6)
-
Step 600
600
#3B817A
oklch(55.6% 0.071 186.6)
-
Step 700
700
#2C6D67
oklch(49.1% 0.067 187)
-
Step 800
800 (this color)
#21544F
oklch(41% 0.055 186.6)
-
Step 900
900
#244945
oklch(37.7% 0.043 186.5)
-
Step 950
950
#162B28
oklch(27% 0.028 184.2)
#21544F 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) | #50504F | 0.059 |
| Deuteranopia (no green cones) | #484A50 | 0.055 |
| Tritanopia (no blue cones) | #005652 | 0.016 |
| Achromatopsia (no color) | #4C4C4C | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21544F
#21544F
oklch(41% 0.055 186.6)
- #643D45
#643D45
oklch(40.9% 0.056 6.5)
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 #21544F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Deep Teal #00555A ΔE 0.022
- Dark Blue Green #005249 ΔE 0.023
- Dark Teal #014D4E ΔE 0.032
- Dark Green Blue #1F6357 ΔE 0.047
- Petrol #005F6A ΔE 0.047
- Charcoal #264653 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.057
Use #21544F 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.