#21745B
Closest named color: Dark Aquamarine (#017371). oklch(50.3% 0.088 168.7), rgb(33, 116, 91).
Aa
White text reads best on this color (5.65:1).
About this color
#21745B is a medium-dark, moderately saturated green. In OKLCH its lightness is 50%, its chroma 0.088 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.036 away. White text reads best on it, at 5.65:1.
| Hue family | Greens |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.088) |
| Temperature | in between |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #21745B |
| RGB | rgb(33, 116, 91) |
| HSL | hsl(162, 56%, 29%) |
| OKLCH | oklch(50.3% 0.088 168.7) |
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 #21745B | 5.65:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #21745B | 3.71:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #21745B text on white | 5.65:1 | AA | Lc 78.0 | Fine for body text |
| #21745B text on black | 3.71:1 | AA large text | Lc -23.8 | 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
#E2EDE8
oklch(93.6% 0.013 167.2)
-
Step 200
200
#CBDED6
oklch(88.4% 0.023 168.7)
-
Step 300
300
#A7CABC
oklch(80.9% 0.042 169)
-
Step 400
400
#75AF99
oklch(70.8% 0.069 168.6)
-
Step 500
500
#4D9B80
oklch(63.2% 0.088 168.5)
-
Step 600
600
#2B8569
oklch(55.6% 0.095 168.5)
-
Step 700
700 (this color)
#21745B
oklch(50.3% 0.088 168.7)
-
Step 800
800
#1B5C48
oklch(42.8% 0.073 168.7)
-
Step 900
900
#1E4B3C
oklch(37.6% 0.056 168.7)
-
Step 950
950
#132C23
oklch(27% 0.036 168.1)
#21745B 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) | #716C5A | 0.090 |
| Deuteranopia (no green cones) | #66645D | 0.086 |
| Tritanopia (no blue cones) | #00756D | 0.028 |
| Achromatopsia (no color) | #676767 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21745B
#21745B
oklch(50.3% 0.088 168.7)
- #894E6C
#894E6C
oklch(50.3% 0.088 348.9)
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 #21745B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.036
- Deep Turquoise #017374 ΔE 0.041
- Bluegreen #017A79 ΔE 0.044
- Dark Aqua #05696B ΔE 0.052
- Deep Aqua #08787F ΔE 0.054
- Dark Green Blue #1F6357 ΔE 0.054
- Teal #008080 ΔE 0.057
- Jungle Green #048243 ΔE 0.065
Use #21745B 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.