#21725E
Closest named color: Dark Aquamarine (#017371). oklch(49.8% 0.083 172.9), rgb(33, 114, 94).
Aa
White text reads best on this color (5.77:1).
About this color
#21725E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.083 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.029 away. White text reads best on it, at 5.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #21725E |
| RGB | rgb(33, 114, 94) |
| HSL | hsl(165, 55%, 29%) |
| OKLCH | oklch(49.8% 0.083 172.9) |
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 #21725E | 5.77:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #21725E | 3.63:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #21725E text on white | 5.77:1 | AA | Lc 78.6 | Fine for body text |
| #21725E text on black | 3.63:1 | AA large text | Lc -23.2 | 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
#E2ECE9
oklch(93.5% 0.011 176.3)
-
Step 200
200
#CBDED8
oklch(88.5% 0.022 174.9)
-
Step 300
300
#A7CABE
oklch(81% 0.041 172.4)
-
Step 400
400
#76AE9D
oklch(70.7% 0.064 173.4)
-
Step 500
500
#4F9A84
oklch(63.1% 0.083 172.2)
-
Step 600
600
#2D846E
oklch(55.5% 0.09 173)
-
Step 700
700 (this color)
#21725E
oklch(49.8% 0.083 172.9)
-
Step 800
800
#1C5B4B
oklch(42.6% 0.069 172.8)
-
Step 900
900
#1E4B3F
oklch(37.7% 0.054 173.3)
-
Step 950
950
#132C25
oklch(27% 0.034 173.4)
#21725E 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) | #6E6A5D | 0.086 |
| Deuteranopia (no green cones) | #63625F | 0.083 |
| Tritanopia (no blue cones) | #00736C | 0.022 |
| Achromatopsia (no color) | #666666 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21725E
#21725E
oklch(49.8% 0.083 172.9)
- #874E67
#874E67
oklch(49.8% 0.083 352.8)
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 #21725E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.029
- Deep Turquoise #017374 ΔE 0.034
- Bluegreen #017A79 ΔE 0.041
- Dark Aqua #05696B ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.047
- Deep Aqua #08787F ΔE 0.049
- Teal #008080 ΔE 0.057
- Dark Olive Green #556B2F ΔE 0.069
Use #21725E 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.