#21857E
Closest named color: Teal (#008080). oklch(56% 0.088 187.9), rgb(33, 133, 126).
Aa
Black text reads best on this color (4.72:1).
About this color
#21857E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.088 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.021 away. Black text reads best on it, at 4.72:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #21857E |
| RGB | rgb(33, 133, 126) |
| HSL | hsl(176, 60%, 33%) |
| OKLCH | oklch(56% 0.088 187.9) |
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 #21857E | 4.44:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #21857E | 4.72:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #21857E text on white | 4.44:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #21857E text on black | 4.72:1 | AA | Lc -31.2 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CADEDC
oklch(88.5% 0.022 189.5)
-
Step 300
300
#A4C9C5
oklch(80.8% 0.04 188.3)
-
Step 400
400
#71AEA8
oklch(70.8% 0.064 188)
-
Step 500
500
#469992
oklch(63% 0.081 187.9)
-
Step 600
600 (this color)
#21857E
oklch(56% 0.088 187.9)
-
Step 700
700
#0D6F69
oklch(49% 0.082 188.1)
-
Step 800
800
#125B56
oklch(42.8% 0.068 188)
-
Step 900
900
#194B47
oklch(37.8% 0.053 187.8)
-
Step 950
950
#102C29
oklch(27% 0.034 186.1)
#21857E 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) | #7D7E7E | 0.093 |
| Deuteranopia (no green cones) | #6F737F | 0.088 |
| Tritanopia (no blue cones) | #008883 | 0.011 |
| Achromatopsia (no color) | #777777 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21857E
#21857E
oklch(56% 0.088 187.9)
- #A15E6B
#A15E6B
oklch(56.1% 0.089 7.8)
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 #21857E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.021
- Dark Cyan #008B8B ΔE 0.022
- Bluegreen #017A79 ΔE 0.037
- Deep Aqua #08787F ΔE 0.044
- Teal Green #0A9396 ΔE 0.047
- Dusty Teal #4C9085 ΔE 0.049
- Teal Blue #01889F ΔE 0.050
- Ocean #017B92 ΔE 0.052
Use #21857E 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.