#21BB7F
Closest named color: Dark Seafoam (#1FB57A). oklch(70.2% 0.15 160.5), rgb(33, 187, 127).
Aa
Black text reads best on this color (8.47:1).
About this color
#21BB7F is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.150 and its hue 161°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.017 away. Black text reads best on it, at 8.47:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 8.47:1 |
| White text | 2.47:1 |
Values
| HEX | #21BB7F |
| RGB | rgb(33, 187, 127) |
| HSL | hsl(157, 70%, 43%) |
| OKLCH | oklch(70.2% 0.15 160.5) |
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 #21BB7F | 2.47:1 | Fails | Lc -53.2 | Large or bold text, headings |
| Black text on #21BB7F | 8.47:1 | AAA | Lc 55.9 | Large or bold text, headings |
| #21BB7F text on white | 2.47:1 | Fails | Lc 48.1 | Large or bold text, headings |
| #21BB7F text on black | 8.47:1 | AAA | Lc -53.9 | 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
#EFF8F3
oklch(97.1% 0.012 162.1)
-
Step 100
100
#DBF0E4
oklch(93.6% 0.027 160.9)
-
Step 200
200
#BCE4CE
oklch(88.4% 0.051 161.1)
-
Step 300
300
#88D4AC
oklch(80.9% 0.095 160.3)
-
Step 400
400 (this color)
#21BB7F
oklch(70.2% 0.15 160.5)
-
Step 500
500
#00A36C
oklch(63.2% 0.142 160.5)
-
Step 600
600
#00895A
oklch(55.6% 0.125 160.5)
-
Step 700
700
#00734B
oklch(49% 0.11 160.6)
-
Step 800
800
#005F3D
oklch(42.9% 0.096 160.4)
-
Step 900
900
#004F32
oklch(37.7% 0.085 160.4)
-
Step 950
950
#002F1C
oklch(26.9% 0.06 160.5)
#21BB7F 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) | #B8AC7B | 0.142 |
| Deuteranopia (no green cones) | #A79F83 | 0.139 |
| Tritanopia (no blue cones) | #00BAAB | 0.063 |
| Achromatopsia (no color) | #A5A5A5 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21BB7F
#21BB7F
oklch(70.2% 0.15 160.5)
- #DC77BC
#DC77BC
oklch(70.4% 0.15 340.4)
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 #21BB7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.017
- Green Blue #01C08D ΔE 0.019
- Green Teal #0CB577 ΔE 0.020
- Medium Sea Green #3CB371 ΔE 0.024
- Dark Mint Green #20C073 ΔE 0.025
- Greenblue #23C48B ΔE 0.027
- Bluey Green #2BB179 ΔE 0.028
- Dark Mint #48C072 ΔE 0.030
Use #21BB7F 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.