#21766E
Closest named color: Dark Aquamarine (#017371). oklch(51.4% 0.08 185.9), rgb(33, 118, 110).
Aa
White text reads best on this color (5.41:1).
About this color
#21766E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.080 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.017 away. White text reads best on it, at 5.41:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.88:1 |
| White text | 5.41:1 |
Values
| HEX | #21766E |
| RGB | rgb(33, 118, 110) |
| HSL | hsl(174, 56%, 30%) |
| OKLCH | oklch(51.4% 0.08 185.9) |
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 #21766E | 5.41:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #21766E | 3.88:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #21766E text on white | 5.41:1 | AA | Lc 76.7 | Fine for body text |
| #21766E text on black | 3.88:1 | AA large text | Lc -25.1 | 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 700.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CADEDB
oklch(88.5% 0.022 186)
-
Step 300
300
#A6C9C4
oklch(80.9% 0.038 185.9)
-
Step 400
400
#73ADA6
oklch(70.6% 0.061 186.4)
-
Step 500
500
#4B9990
oklch(63.1% 0.078 185.5)
-
Step 600
600
#27837B
oklch(55.5% 0.085 186.6)
-
Step 700
700 (this color)
#21766E
oklch(51.4% 0.08 185.9)
-
Step 800
800
#185B54
oklch(42.8% 0.066 185)
-
Step 900
900
#1C4A46
oklch(37.6% 0.051 187.5)
-
Step 950
950
#122C29
oklch(27.1% 0.033 185.7)
#21766E 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) | #706F6E | 0.085 |
| Deuteranopia (no green cones) | #63666F | 0.080 |
| Tritanopia (no blue cones) | #007973 | 0.012 |
| Achromatopsia (no color) | #6A6A6A | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21766E
#21766E
oklch(51.4% 0.08 185.9)
- #8E5360
#8E5360
oklch(51.4% 0.08 6)
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 #21766E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.017
- Bluegreen #017A79 ΔE 0.018
- Deep Turquoise #017374 ΔE 0.019
- Deep Aqua #08787F ΔE 0.026
- Teal #008080 ΔE 0.034
- Dark Aqua #05696B ΔE 0.044
- Ocean #017B92 ΔE 0.055
- Dark Green Blue #1F6357 ΔE 0.062
Use #21766E 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.