#21777E
Closest named color: Deep Aqua (#08787F). oklch(52.3% 0.079 203.1), rgb(33, 119, 126).
Aa
White text reads best on this color (5.24:1).
About this color
#21777E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.079 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.008 away. White text reads best on it, at 5.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #21777E |
| RGB | rgb(33, 119, 126) |
| HSL | hsl(185, 58%, 31%) |
| OKLCH | oklch(52.3% 0.079 203.1) |
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 #21777E | 5.24:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #21777E | 4.00:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #21777E text on white | 5.24:1 | AA | Lc 75.7 | Fine for body text |
| #21777E text on black | 4.00:1 | AA large text | Lc -26.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADEDF
oklch(88.6% 0.021 200.4)
-
Step 300
300
#A5C8CC
oklch(80.9% 0.038 205)
-
Step 400
400
#72ACB2
oklch(70.7% 0.061 204.1)
-
Step 500
500
#48979E
oklch(63% 0.078 203.1)
-
Step 600
600
#238289
oklch(55.7% 0.085 202.4)
-
Step 700
700 (this color)
#21777E
oklch(52.3% 0.079 203.1)
-
Step 800
800
#15595F
oklch(42.6% 0.065 203.8)
-
Step 900
900
#1A4A4E
oklch(37.9% 0.051 202.8)
-
Step 950
950
#112B2D
oklch(27% 0.032 202.1)
#21777E 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) | #6D727F | 0.079 |
| Deuteranopia (no green cones) | #60687E | 0.073 |
| Tritanopia (no blue cones) | #007C79 | 0.022 |
| Achromatopsia (no color) | #6C6C6C | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21777E
#21777E
oklch(52.3% 0.079 203.1)
- #925754
#925754
oklch(52.3% 0.079 23.2)
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 #21777E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.008
- Bluegreen #017A79 ΔE 0.017
- Deep Turquoise #017374 ΔE 0.023
- Dark Aquamarine #017371 ΔE 0.027
- Teal #008080 ΔE 0.027
- Ocean #017B92 ΔE 0.031
- Sea Blue #047495 ΔE 0.041
- Dark Aqua #05696B ΔE 0.051
Use #21777E 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.