#21A2DB
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.3% 0.133 234.2), rgb(33, 162, 219).
Aa
Black text reads best on this color (7.25:1).
About this color
#21A2DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.133 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.055 away. Black text reads best on it, at 7.25:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.25:1 |
| White text | 2.89:1 |
Values
| HEX | #21A2DB |
| RGB | rgb(33, 162, 219) |
| HSL | hsl(198, 74%, 49%) |
| OKLCH | oklch(67.3% 0.133 234.2) |
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 #21A2DB | 2.89:1 | Fails | Lc -60.0 | Content text, not long reading |
| Black text on #21A2DB | 7.25:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #21A2DB text on white | 2.89:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #21A2DB text on black | 7.25:1 | AAA | Lc -47.1 | 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
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DBEDF8
oklch(93.6% 0.024 234.4)
-
Step 200
200
#BCDFF4
oklch(88.5% 0.047 234.4)
-
Step 300
300
#8ACAEF
oklch(80.9% 0.084 234.6)
-
Step 400
400 (this color)
#21A2DB
oklch(67.3% 0.133 234.2)
-
Step 500
500
#0095CD
oklch(63.1% 0.132 234.2)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004865
oklch(37.8% 0.079 233.7)
-
Step 950
950
#002A3E
oklch(26.9% 0.057 235.2)
#21A2DB 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) | #86A1DE | 0.082 |
| Deuteranopia (no green cones) | #6E90DA | 0.069 |
| Tritanopia (no blue cones) | #00B1B6 | 0.080 |
| Achromatopsia (no color) | #989898 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21A2DB
#21A2DB
oklch(67.3% 0.133 234.2)
- #D47D3D
#D47D3D
oklch(67.3% 0.133 54.3)
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 #21A2DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.060
- Turquoise Blue #06B1C4 ΔE 0.063
- Cornflower Blue #6495ED ΔE 0.065
- Faded Blue #658CBB ΔE 0.074
- Water Blue #0E87CC ΔE 0.077
- Dodger Blue #1E90FF ΔE 0.080
- Greyblue #77A1B5 ΔE 0.080
Use #21A2DB 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.