#21839C
Closest named color: Teal Blue (#01889F). oklch(56.7% 0.093 219.4), rgb(33, 131, 156).
Aa
Black text reads best on this color (4.79:1).
About this color
#21839C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.093 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.015 away. Black text reads best on it, at 4.79:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 4.79:1 |
| White text | 4.38:1 |
Values
| HEX | #21839C |
| RGB | rgb(33, 131, 156) |
| HSL | hsl(192, 65%, 37%) |
| OKLCH | oklch(56.7% 0.093 219.4) |
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 #21839C | 4.38:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #21839C | 4.79:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #21839C text on white | 4.38:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #21839C text on black | 4.79:1 | AA | Lc -31.7 | Non-text elements, placeholder 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A3C8D3
oklch(81% 0.042 217.8)
-
Step 400
400
#6FABBD
oklch(70.7% 0.067 218.8)
-
Step 500
500
#4496AD
oklch(63.2% 0.086 219)
-
Step 600
600 (this color)
#21839C
oklch(56.7% 0.093 219.4)
-
Step 700
700
#086C82
oklch(49.1% 0.087 218.8)
-
Step 800
800
#10586A
oklch(42.7% 0.072 219.5)
-
Step 900
900
#184856
oklch(37.6% 0.056 220.6)
-
Step 950
950
#102B32
oklch(27.1% 0.035 217.1)
#21839C 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) | #747F9D | 0.079 |
| Deuteranopia (no green cones) | #63739C | 0.070 |
| Tritanopia (no blue cones) | #008B8B | 0.042 |
| Achromatopsia (no color) | #797979 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21839C
#21839C
oklch(56.7% 0.093 219.4)
- #A5624C
#A5624C
oklch(56.6% 0.094 38.9)
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 #21839C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.015
- Ocean #017B92 ΔE 0.030
- Cerulean #457B9D ΔE 0.032
- Blue NCS #118AB2 ΔE 0.035
- Stormy Blue #507B9C ΔE 0.040
- Dark Cyan #008B8B ΔE 0.042
- Teal #008080 ΔE 0.046
- Dull Blue #49759C ΔE 0.047
Use #21839C 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.