#21776B
Closest named color: Bluegreen (#017A79). oklch(51.6% 0.082 181.7), rgb(33, 119, 107).
Aa
White text reads best on this color (5.36:1).
About this color
#21776B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.082 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.021 away. White text reads best on it, at 5.36:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 3.91:1 |
| White text | 5.36:1 |
Values
| HEX | #21776B |
| RGB | rgb(33, 119, 107) |
| HSL | hsl(172, 57%, 30%) |
| OKLCH | oklch(51.6% 0.082 181.7) |
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 #21776B | 5.36:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #21776B | 3.91:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #21776B text on white | 5.36:1 | AA | Lc 76.4 | Fine for body text |
| #21776B text on black | 3.91:1 | AA large text | Lc -25.3 | 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
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CADEDA
oklch(88.5% 0.022 182.5)
-
Step 300
300
#A6C9C2
oklch(80.8% 0.039 181.8)
-
Step 400
400
#73AEA3
oklch(70.7% 0.064 181.4)
-
Step 500
500
#4A9A8D
oklch(63.2% 0.081 181.6)
-
Step 600
600
#268477
oklch(55.6% 0.088 181.8)
-
Step 700
700 (this color)
#21776B
oklch(51.6% 0.082 181.7)
-
Step 800
800
#175B51
oklch(42.7% 0.068 181)
-
Step 900
900
#1B4B43
oklch(37.7% 0.054 180.6)
-
Step 950
950
#122C27
oklch(27.1% 0.034 179.6)
#21776B 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) | #71706B | 0.086 |
| Deuteranopia (no green cones) | #65676C | 0.082 |
| Tritanopia (no blue cones) | #007973 | 0.014 |
| Achromatopsia (no color) | #6B6B6B | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21776B
#21776B
oklch(51.6% 0.082 181.7)
- #8F5364
#8F5364
oklch(51.6% 0.082 2.1)
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 #21776B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.021
- Dark Aquamarine #017371 ΔE 0.022
- Deep Turquoise #017374 ΔE 0.024
- Deep Aqua #08787F ΔE 0.031
- Teal #008080 ΔE 0.035
- Dark Aqua #05696B ΔE 0.048
- Ocean #017B92 ΔE 0.059
- Dark Green Blue #1F6357 ΔE 0.063
Use #21776B 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.