#21B08D
Closest named color: Greeny Blue (#42B395). oklch(67.7% 0.126 171), rgb(33, 176, 141).
Aa
Black text reads best on this color (7.65:1).
About this color
#21B08D is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.126 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.022 away. Black text reads best on it, at 7.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 7.65:1 |
| White text | 2.74:1 |
Values
| HEX | #21B08D |
| RGB | rgb(33, 176, 141) |
| HSL | hsl(165, 68%, 41%) |
| OKLCH | oklch(67.7% 0.126 171) |
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 #21B08D | 2.74:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #21B08D | 7.65:1 | AAA | Lc 51.5 | Large or bold text, headings |
| #21B08D text on white | 2.74:1 | Fails | Lc 52.5 | Large or bold text, headings |
| #21B08D text on black | 7.65:1 | AAA | Lc -49.3 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF8F4
oklch(97.1% 0.011 167.8)
-
Step 100
100
#DCEFE8
oklch(93.6% 0.022 171.8)
-
Step 200
200
#BDE3D5
oklch(88.5% 0.044 170.9)
-
Step 300
300
#8BD2BA
oklch(81% 0.079 171)
-
Step 400
400 (this color)
#21B08D
oklch(67.7% 0.126 171)
-
Step 500
500
#00A17F
oklch(63.1% 0.124 170.8)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
Step 700
700
#007259
oklch(49.1% 0.097 170.7)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#004E3C
oklch(37.7% 0.074 170.6)
-
Step 950
950
#002F23
oklch(27.2% 0.053 170.5)
#21B08D 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) | #ABA48B | 0.129 |
| Deuteranopia (no green cones) | #99978F | 0.123 |
| Tritanopia (no blue cones) | #00B1A6 | 0.035 |
| Achromatopsia (no color) | #9C9C9C | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21B08D
#21B08D
oklch(67.7% 0.126 171)
- #D175A1
#D175A1
oklch(67.7% 0.126 350.9)
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 #21B08D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.022
- Bluey Green #2BB179 ΔE 0.029
- Dark Seafoam Green #3EAF76 ΔE 0.031
- Dark Seafoam #1FB57A ΔE 0.034
- Jade #1FA774 ΔE 0.038
- Green Teal #0CB577 ΔE 0.039
- Light Sea Green #20B2AA ΔE 0.042
- Medium Sea Green #3CB371 ΔE 0.042
Use #21B08D 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.