#21664B
Closest named color: Dark Green Blue (#1F6357). oklch(45.9% 0.082 163.6), rgb(33, 102, 75).
Aa
White text reads best on this color (6.84:1).
About this color
#21664B is a medium-dark, moderately saturated green. In OKLCH its lightness is 46%, its chroma 0.082 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.024 away. White text reads best on it, at 6.84:1.
| Hue family | Greens |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.082) |
| Temperature | in between |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.06:1 |
| White text | 6.84:1 |
Values
| HEX | #21664B |
| RGB | rgb(33, 102, 75) |
| HSL | hsl(157, 51%, 26%) |
| OKLCH | oklch(45.9% 0.082 163.6) |
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 #21664B | 6.84:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #21664B | 3.06:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #21664B text on white | 6.84:1 | AA | Lc 83.4 | Fine for body text |
| #21664B text on black | 3.06:1 | AA large text | Lc -18.6 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E3ECE8
oklch(93.5% 0.011 167.8)
-
Step 200
200
#CDDED5
oklch(88.5% 0.022 163)
-
Step 300
300
#AAC9BA
oklch(80.9% 0.039 164.6)
-
Step 400
400
#7CAE96
oklch(70.8% 0.064 163.5)
-
Step 500
500
#58997C
oklch(63.1% 0.081 163.7)
-
Step 600
600
#3A8465
oklch(55.7% 0.089 163.5)
-
Step 700
700 (this color)
#21664B
oklch(45.9% 0.082 163.6)
-
Step 800
800
#265B45
oklch(42.8% 0.068 163.7)
-
Step 900
900
#244A3A
oklch(37.6% 0.052 164.5)
-
Step 950
950
#162C22
oklch(27.1% 0.034 163.4)
#21664B 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) | #645F4A | 0.080 |
| Deuteranopia (no green cones) | #5B584D | 0.078 |
| Tritanopia (no blue cones) | #00665F | 0.032 |
| Achromatopsia (no color) | #5A5A5A | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21664B
#21664B
oklch(45.9% 0.082 163.6)
- #774463
#774463
oklch(45.8% 0.082 343.6)
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 #21664B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.024
- Pine #2B5D34 ΔE 0.036
- Spruce #0A5F38 ΔE 0.037
- Dark Aqua #05696B ΔE 0.049
- Dark Aquamarine #017371 ΔE 0.060
- Camo Green #526525 ΔE 0.063
- Petrol #005F6A ΔE 0.063
- Deep Turquoise #017374 ΔE 0.064
Use #21664B 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.