#21868B
Closest named color: Dark Cyan (#008B8B). oklch(56.7% 0.088 200), rgb(33, 134, 139).
Aa
Black text reads best on this color (4.84:1).
About this color
#21868B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.088 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.016 away. Black text reads best on it, at 4.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #21868B |
| RGB | rgb(33, 134, 139) |
| HSL | hsl(183, 62%, 34%) |
| OKLCH | oklch(56.7% 0.088 200) |
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 #21868B | 4.33:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #21868B | 4.84:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #21868B text on white | 4.33:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #21868B text on black | 4.84:1 | AA | Lc -32.0 | 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
#F2F7F7
oklch(97.2% 0.005 197.1)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#C9DEDF
oklch(88.5% 0.022 200.2)
-
Step 300
300
#A4C9CB
oklch(81% 0.039 200.5)
-
Step 400
400
#70ADB0
oklch(70.7% 0.063 199.8)
-
Step 500
500
#44989D
oklch(63% 0.081 200.6)
-
Step 600
600 (this color)
#21868B
oklch(56.7% 0.088 200)
-
Step 700
700
#076E73
oklch(49% 0.082 200.5)
-
Step 800
800
#0F5A5E
oklch(42.7% 0.068 200.5)
-
Step 900
900
#184A4D
oklch(37.7% 0.053 200.8)
-
Step 950
950
#102B2D
oklch(26.9% 0.033 201.9)
#21868B 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) | #7C808B | 0.090 |
| Deuteranopia (no green cones) | #6D758B | 0.083 |
| Tritanopia (no blue cones) | #008B87 | 0.020 |
| Achromatopsia (no color) | #797979 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21868B
#21868B
oklch(56.7% 0.088 200)
- #A46161
#A46161
oklch(56.8% 0.087 20.2)
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 #21868B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.016
- Teal #008080 ΔE 0.026
- Teal Blue #01889F ΔE 0.030
- Teal Green #0A9396 ΔE 0.037
- Ocean #017B92 ΔE 0.041
- Bluegreen #017A79 ΔE 0.044
- Deep Aqua #08787F ΔE 0.046
- Dusty Teal #4C9085 ΔE 0.048
Use #21868B 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.