#21655E
Closest named color: Dark Green Blue (#1F6357). oklch(46.2% 0.068 185.5), rgb(33, 101, 94).
Aa
White text reads best on this color (6.80:1).
About this color
#21655E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.068 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.012 away. White text reads best on it, at 6.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.08:1 |
| White text | 6.80:1 |
Values
| HEX | #21655E |
| RGB | rgb(33, 101, 94) |
| HSL | hsl(174, 51%, 26%) |
| OKLCH | oklch(46.2% 0.068 185.5) |
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 #21655E | 6.80:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #21655E | 3.08:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #21655E text on white | 6.80:1 | AA | Lc 83.2 | Fine for body text |
| #21655E text on black | 3.08:1 | AA large text | Lc -18.7 | 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
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CDDDDB
oklch(88.5% 0.017 187.8)
-
Step 300
300
#AAC8C3
oklch(80.9% 0.033 184.4)
-
Step 400
400
#7BACA5
oklch(70.8% 0.053 185.1)
-
Step 500
500
#57978F
oklch(63.1% 0.067 185.4)
-
Step 600
600
#398179
oklch(55.5% 0.073 185.6)
-
Step 700
700 (this color)
#21655E
oklch(46.2% 0.068 185.5)
-
Step 800
800
#255953
oklch(42.7% 0.056 185.2)
-
Step 900
900
#244945
oklch(37.7% 0.043 186.5)
-
Step 950
950
#162B28
oklch(27% 0.028 184.2)
#21655E 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) | #605F5E | 0.073 |
| Deuteranopia (no green cones) | #56585F | 0.069 |
| Tritanopia (no blue cones) | #006763 | 0.013 |
| Achromatopsia (no color) | #5B5B5B | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21655E
#21655E
oklch(46.2% 0.068 185.5)
- #794853
#794853
oklch(46.2% 0.068 5.6)
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 #21655E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.012
- Dark Aqua #05696B ΔE 0.021
- Petrol #005F6A ΔE 0.035
- Dark Aquamarine #017371 ΔE 0.045
- Deep Turquoise #017374 ΔE 0.047
- Deep Teal #00555A ΔE 0.057
- Pine #2B5D34 ΔE 0.061
- Spruce #0A5F38 ΔE 0.062
Use #21655E 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.