#21F1DC
Closest named color: Bright Aqua (#0BF9EA). oklch(86.3% 0.149 183.6), rgb(33, 241, 220).
Aa
Black text reads best on this color (14.68:1).
About this color
#21F1DC is a light, vivid teal or cyan. In OKLCH its lightness is 86%, its chroma 0.149 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.024 away. Black text reads best on it, at 14.68:1.
| Hue family | Teals and cyans |
| Lightness | light (86%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 14.68:1 |
| White text | 1.43:1 |
Values
| HEX | #21F1DC |
| RGB | rgb(33, 241, 220) |
| HSL | hsl(174, 88%, 54%) |
| OKLCH | oklch(86.3% 0.149 183.6) |
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 #21F1DC | 1.43:1 | Fails | Lc -22.9 | Dividers and decoration only |
| Black text on #21F1DC | 14.68:1 | AAA | Lc 83.6 | Fine for body text |
| #21F1DC text on white | 1.43:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #21F1DC text on black | 14.68:1 | AAA | Lc -83.4 | Fine for body text |
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 200.
-
Step 50
50
#E4FCF7
oklch(97.2% 0.026 181.9)
-
Step 100
100
#C1F7EE
oklch(93.7% 0.056 183.8)
-
Step 200
200 (this color)
#21F1DC
oklch(86.3% 0.149 183.6)
-
Step 300
300
#00DECA
oklch(80.9% 0.144 183.5)
-
Step 400
400
#00B9A9
oklch(70.6% 0.125 184)
-
Step 500
500
#009F90
oklch(63.1% 0.112 183.2)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#21F1DC 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) | #E5E3DB | 0.158 |
| Deuteranopia (no green cones) | #CBD0DE | 0.150 |
| Tritanopia (no blue cones) | #00F6EA | 0.020 |
| Achromatopsia (no color) | #D8D8D8 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21F1DC
#21F1DC
oklch(86.3% 0.149 183.6)
- #FFBDCC
#FFBDCC
oklch(86.3% 0.078 3.8)
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 #21F1DC, closest first.
No curated palette has a color within ΔE 0.04 of #21F1DC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.024
- Bright Teal #01F9C6 ΔE 0.043
- Turquoise #40E0D0 ΔE 0.044
- Aqua Marine #2EE8BB ΔE 0.045
- Bright Light Blue #26F7FD ΔE 0.045
- Bright Turquoise #0FFEF9 ΔE 0.045
- Light Turquoise #7EF4CC ΔE 0.050
- Cyan #00FFFF ΔE 0.052
Use #21F1DC 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.