#21BFA7
Closest named color: Topaz (#13BBAF). oklch(72.3% 0.127 179), rgb(33, 191, 167).
Aa
Black text reads best on this color (9.07:1).
About this color
#21BFA7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.127 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.019 away. Black text reads best on it, at 9.07:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.07:1 |
| White text | 2.31:1 |
Values
| HEX | #21BFA7 |
| RGB | rgb(33, 191, 167) |
| HSL | hsl(171, 71%, 44%) |
| OKLCH | oklch(72.3% 0.127 179) |
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 #21BFA7 | 2.31:1 | Fails | Lc -50.0 | Large or bold text, headings |
| Black text on #21BFA7 | 9.07:1 | AAA | Lc 58.9 | Large or bold text, headings |
| #21BFA7 text on white | 2.31:1 | Fails | Lc 45.1 | Large or bold text, headings |
| #21BFA7 text on black | 9.07:1 | AAA | Lc -57.0 | 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
#EEF8F5
oklch(97.1% 0.011 176.3)
-
Step 100
100
#DBEFEA
oklch(93.6% 0.022 179.2)
-
Step 200
200
#BBE3D9
oklch(88.4% 0.044 178.4)
-
Step 300
300
#86D2C1
oklch(80.9% 0.08 178.4)
-
Step 400
400 (this color)
#21BFA7
oklch(72.3% 0.127 179)
-
Step 500
500
#00A08B
oklch(63.2% 0.115 179)
-
Step 600
600
#008674
oklch(55.5% 0.101 178.9)
-
Step 700
700
#007162
oklch(49.1% 0.09 179.3)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#21BFA7 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) | #B7B3A6 | 0.134 |
| Deuteranopia (no green cones) | #A3A4A9 | 0.128 |
| Tritanopia (no blue cones) | #00C2B8 | 0.023 |
| Achromatopsia (no color) | #AAAAAA | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21BFA7
#21BFA7
oklch(72.3% 0.127 179)
- #E582A4
#E582A4
oklch(72.3% 0.127 358.8)
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 #21BFA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.019
- Greeny Blue #42B395 ΔE 0.035
- Green Blue #01C08D ΔE 0.040
- Light Sea Green #20B2AA ΔE 0.040
- Greenblue #23C48B ΔE 0.046
- Medium Aquamarine #66CDAA ΔE 0.060
- Dark Seafoam #1FB57A ΔE 0.062
- Dark Turquoise #00CED1 ΔE 0.063
Use #21BFA7 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.