#21B189
Closest named color: Bluey Green (#2BB179). oklch(67.9% 0.13 168.4), rgb(33, 177, 137).
Aa
Black text reads best on this color (7.71:1).
About this color
#21B189 is a medium-light, moderately saturated green. In OKLCH its lightness is 68%, its chroma 0.130 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Green (#2BB179), ΔE 0.022 away. Black text reads best on it, at 7.71:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Bluey Green (#2BB179) |
| Black text | 7.71:1 |
| White text | 2.72:1 |
Values
| HEX | #21B189 |
| RGB | rgb(33, 177, 137) |
| HSL | hsl(163, 69%, 41%) |
| OKLCH | oklch(67.9% 0.13 168.4) |
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 #21B189 | 2.72:1 | Fails | Lc -57.4 | Large or bold text, headings |
| Black text on #21B189 | 7.71:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #21B189 text on white | 2.72:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #21B189 text on black | 7.71:1 | AAA | Lc -49.6 | 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
#DCEFE7
oklch(93.6% 0.023 168.7)
-
Step 200
200
#BDE3D4
oklch(88.4% 0.045 169.4)
-
Step 300
300
#8BD2B7
oklch(80.9% 0.081 168.4)
-
Step 400
400 (this color)
#21B189
oklch(67.9% 0.13 168.4)
-
Step 500
500
#00A17B
oklch(63% 0.127 168.5)
-
Step 600
600
#008867
oklch(55.7% 0.112 168.2)
-
Step 700
700
#007256
oklch(49% 0.099 168.4)
-
Step 800
800
#005E46
oklch(42.8% 0.087 168)
-
Step 900
900
#004E3A
oklch(37.7% 0.076 168.5)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#21B189 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) | #ACA487 | 0.131 |
| Deuteranopia (no green cones) | #9B988C | 0.126 |
| Tritanopia (no blue cones) | #00B2A6 | 0.041 |
| Achromatopsia (no color) | #9D9D9D | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21B189
#21B189
oklch(67.9% 0.13 168.4)
- #D275A5
#D275A5
oklch(68% 0.129 348.8)
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 #21B189, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Green #2BB179 ΔE 0.022
- Dark Seafoam Green #3EAF76 ΔE 0.025
- Greeny Blue #42B395 ΔE 0.025
- Dark Seafoam #1FB57A ΔE 0.027
- Green Teal #0CB577 ΔE 0.032
- Medium Sea Green #3CB371 ΔE 0.035
- Jade #1FA774 ΔE 0.036
- Seaweed Green #35AD6B ΔE 0.038
Use #21B189 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.