#21816C
Closest named color: Teal (#008080). oklch(54.3% 0.093 174.5), rgb(33, 129, 108).
Aa
White text reads best on this color (4.74:1).
About this color
#21816C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.093 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.033 away. White text reads best on it, at 4.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.42:1 |
| White text | 4.74:1 |
Values
| HEX | #21816C |
| RGB | rgb(33, 129, 108) |
| HSL | hsl(167, 59%, 32%) |
| OKLCH | oklch(54.3% 0.093 174.5) |
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 #21816C | 4.74:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #21816C | 4.42:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #21816C text on white | 4.74:1 | AA | Lc 72.6 | Content text, not long reading |
| #21816C text on black | 4.42:1 | AA large text | Lc -29.1 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CADED8
oklch(88.4% 0.023 175.9)
-
Step 300
300
#A6CABF
oklch(81% 0.041 174.7)
-
Step 400
400
#73AF9E
oklch(70.8% 0.067 174.5)
-
Step 500
500
#4A9A86
oklch(63% 0.085 174.9)
-
Step 600
600 (this color)
#21816C
oklch(54.3% 0.093 174.5)
-
Step 700
700
#16705D
oklch(49% 0.086 174.5)
-
Step 800
800
#175C4C
oklch(42.8% 0.072 173.8)
-
Step 900
900
#1C4B40
oklch(37.7% 0.055 175.4)
-
Step 950
950
#122C25
oklch(27% 0.035 173.9)
#21816C 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) | #7C786B | 0.096 |
| Deuteranopia (no green cones) | #6F6F6E | 0.092 |
| Tritanopia (no blue cones) | #00837B | 0.022 |
| Achromatopsia (no color) | #737373 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21816C
#21816C
oklch(54.3% 0.093 174.5)
- #995873
#995873
oklch(54.3% 0.092 354.2)
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 #21816C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.033
- Bluegreen #017A79 ΔE 0.036
- Dark Cyan #008B8B ΔE 0.048
- Deep Aqua #08787F ΔE 0.048
- Dark Aquamarine #017371 ΔE 0.050
- Sea Green #2E8B57 ΔE 0.051
- Deep Turquoise #017374 ΔE 0.052
- Viridian #1E9167 ΔE 0.053
Use #21816C 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.