#21765F
Closest named color: Dark Aquamarine (#017371). oklch(51% 0.088 170.9), rgb(33, 118, 95).
Aa
White text reads best on this color (5.49:1).
About this color
#21765F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.088 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.034 away. White text reads best on it, at 5.49:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #21765F |
| RGB | rgb(33, 118, 95) |
| HSL | hsl(164, 56%, 30%) |
| OKLCH | oklch(51% 0.088 170.9) |
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 #21765F | 5.49:1 | AA | Lc -82.4 | Fine for body text |
| Black text on #21765F | 3.82:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #21765F text on white | 5.49:1 | AA | Lc 77.1 | Fine for body text |
| #21765F text on black | 3.82:1 | AA large text | Lc -24.6 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CBDED7
oklch(88.4% 0.022 171.7)
-
Step 300
300
#A6CABD
oklch(80.9% 0.043 171.3)
-
Step 400
400
#74AF9B
oklch(70.8% 0.068 171)
-
Step 500
500
#4C9B82
oklch(63.2% 0.088 170.4)
-
Step 600
600
#29856C
oklch(55.6% 0.094 171.1)
-
Step 700
700 (this color)
#21765F
oklch(51% 0.088 170.9)
-
Step 800
800
#195C49
oklch(42.8% 0.074 170.1)
-
Step 900
900
#1D4B3D
oklch(37.6% 0.056 170.5)
-
Step 950
950
#122C24
oklch(27% 0.036 171.2)
#21765F 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) | #726E5E | 0.089 |
| Deuteranopia (no green cones) | #676661 | 0.086 |
| Tritanopia (no blue cones) | #00776F | 0.025 |
| Achromatopsia (no color) | #696969 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21765F
#21765F
oklch(51% 0.088 170.9)
- #8C506C
#8C506C
oklch(51% 0.088 351.2)
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 #21765F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.034
- Deep Turquoise #017374 ΔE 0.038
- Bluegreen #017A79 ΔE 0.038
- Deep Aqua #08787F ΔE 0.049
- Teal #008080 ΔE 0.050
- Dark Aqua #05696B ΔE 0.053
- Dark Green Blue #1F6357 ΔE 0.060
- Jungle Green #048243 ΔE 0.064
Use #21765F 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.