#21726F
Closest named color: Dark Aquamarine (#017371). oklch(50.4% 0.076 191.4), rgb(33, 114, 111).
Aa
White text reads best on this color (5.67:1).
About this color
#21726F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.076 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.010 away. White text reads best on it, at 5.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.70:1 |
| White text | 5.67:1 |
Values
| HEX | #21726F |
| RGB | rgb(33, 114, 111) |
| HSL | hsl(178, 55%, 29%) |
| OKLCH | oklch(50.4% 0.076 191.4) |
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 #21726F | 5.67:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #21726F | 3.70:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #21726F text on white | 5.67:1 | AA | Lc 78.1 | Fine for body text |
| #21726F text on black | 3.70:1 | AA large text | Lc -23.7 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDC
oklch(88.6% 0.02 189.2)
-
Step 300
300
#A6C9C6
oklch(81% 0.038 190)
-
Step 400
400
#75ADAA
oklch(70.8% 0.059 191.7)
-
Step 500
500
#4D9895
oklch(63.1% 0.075 192)
-
Step 600
600
#2B827F
oklch(55.5% 0.081 191.8)
-
Step 700
700 (this color)
#21726F
oklch(50.4% 0.076 191.4)
-
Step 800
800
#1B5A57
oklch(42.7% 0.063 190.5)
-
Step 900
900
#1D4A48
oklch(37.7% 0.049 191.3)
-
Step 950
950
#132B2A
oklch(26.9% 0.03 192)
#21726F 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) | #6B6C6F | 0.080 |
| Deuteranopia (no green cones) | #5F6370 | 0.075 |
| Tritanopia (no blue cones) | #007571 | 0.012 |
| Achromatopsia (no color) | #676767 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21726F
#21726F
oklch(50.4% 0.076 191.4)
- #8A5259
#8A5259
oklch(50.5% 0.075 12)
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 #21726F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.010
- Deep Turquoise #017374 ΔE 0.012
- Bluegreen #017A79 ΔE 0.025
- Deep Aqua #08787F ΔE 0.026
- Dark Aqua #05696B ΔE 0.032
- Teal #008080 ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.053
- Ocean #017B92 ΔE 0.054
Use #21726F 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.