#21707F
Closest named color: Deep Aqua (#08787F). oklch(50.5% 0.077 213.1), rgb(33, 112, 127).
Aa
White text reads best on this color (5.69:1).
About this color
#21707F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.077 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.025 away. White text reads best on it, at 5.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #21707F |
| RGB | rgb(33, 112, 127) |
| HSL | hsl(190, 59%, 31%) |
| OKLCH | oklch(50.5% 0.077 213.1) |
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 #21707F | 5.69:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #21707F | 3.68:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #21707F text on white | 5.69:1 | AA | Lc 78.2 | Fine for body text |
| #21707F text on black | 3.68:1 | AA large text | Lc -23.6 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE1
oklch(88.5% 0.021 211.8)
-
Step 300
300
#A6C7CF
oklch(80.8% 0.037 214)
-
Step 400
400
#74ABB7
oklch(70.7% 0.06 212.8)
-
Step 500
500
#4C96A5
oklch(63.1% 0.077 212.5)
-
Step 600
600
#2A8090
oklch(55.6% 0.083 212.5)
-
Step 700
700 (this color)
#21707F
oklch(50.5% 0.077 213.1)
-
Step 800
800
#1A5864
oklch(42.7% 0.064 213.2)
-
Step 900
900
#1D4851
oklch(37.5% 0.05 213.5)
-
Step 950
950
#122B30
oklch(27.1% 0.032 212.2)
#21707F 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) | #656C80 | 0.071 |
| Deuteranopia (no green cones) | #58627F | 0.065 |
| Tritanopia (no blue cones) | #007675 | 0.030 |
| Achromatopsia (no color) | #676767 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21707F
#21707F
oklch(50.5% 0.077 213.1)
- #8B5448
#8B5448
oklch(50.5% 0.076 33.1)
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 #21707F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.025
- Deep Turquoise #017374 ΔE 0.026
- Dark Aquamarine #017371 ΔE 0.030
- Sea Blue #047495 ΔE 0.034
- Bluegreen #017A79 ΔE 0.036
- Ocean #017B92 ΔE 0.038
- Dark Aqua #05696B ΔE 0.039
- Ocean Blue #03719C ΔE 0.046
Use #21707F 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.