#21807B
Closest named color: Teal (#008080). oklch(54.6% 0.085 189.7), rgb(33, 128, 123).
Aa
White text reads best on this color (4.73:1).
About this color
#21807B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.085 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.011 away. White text reads best on it, at 4.73:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.43:1 |
| White text | 4.73:1 |
Values
| HEX | #21807B |
| RGB | rgb(33, 128, 123) |
| HSL | hsl(177, 59%, 32%) |
| OKLCH | oklch(54.6% 0.085 189.7) |
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 #21807B | 4.73:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #21807B | 4.43:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #21807B text on white | 4.73:1 | AA | Lc 72.5 | Content text, not long reading |
| #21807B text on black | 4.43:1 | AA large text | Lc -29.2 | Dividers and decoration only |
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
#A5C9C6
oklch(80.9% 0.039 190.2)
-
Step 400
400
#73ADA9
oklch(70.7% 0.061 190.4)
-
Step 500
500
#4A9994
oklch(63.2% 0.078 189.9)
-
Step 600
600 (this color)
#21807B
oklch(54.6% 0.085 189.7)
-
Step 700
700
#156F6A
oklch(49.1% 0.079 189.1)
-
Step 800
800
#175A57
oklch(42.6% 0.065 190.6)
-
Step 900
900
#1B4A47
oklch(37.6% 0.051 189.5)
-
Step 950
950
#112C2A
oklch(27.1% 0.033 189)
#21807B 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) | #78797B | 0.089 |
| Deuteranopia (no green cones) | #6B6F7C | 0.085 |
| Tritanopia (no blue cones) | #00847E | 0.013 |
| Achromatopsia (no color) | #737373 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21807B
#21807B
oklch(54.6% 0.085 189.7)
- #9B5B65
#9B5B65
oklch(54.7% 0.085 10.2)
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 #21807B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.011
- Bluegreen #017A79 ΔE 0.023
- Deep Aqua #08787F ΔE 0.030
- Dark Cyan #008B8B ΔE 0.035
- Deep Turquoise #017374 ΔE 0.043
- Dark Aquamarine #017371 ΔE 0.044
- Ocean #017B92 ΔE 0.045
- Teal Blue #01889F ΔE 0.054
Use #21807B 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.