#213731
Closest named color: Pakistan Green (#283618). oklch(31.6% 0.03 175.2), rgb(33, 55, 49).
Aa
White text reads best on this color (12.68:1).
About this color
#213731 is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.030 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Pakistan Green (#283618), ΔE 0.039 away. White text reads best on it, at 12.68:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Pakistan Green (#283618) |
| Black text | 1.65:1 |
| White text | 12.68:1 |
Values
| HEX | #213731 |
| RGB | rgb(33, 55, 49) |
| HSL | hsl(164, 25%, 17%) |
| OKLCH | oklch(31.6% 0.03 175.2) |
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 #213731 | 12.68:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #213731 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #213731 text on white | 12.68:1 | AAA | Lc 98.7 | Preferred for body text |
| #213731 text on black | 1.65:1 | Fails | Lc 0.0 | Not readable |
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 950.
-
Step 50
50
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CCDED8
oklch(88.5% 0.021 173.9)
-
Step 300
300
#AAC9BF
oklch(81% 0.036 173.9)
-
Step 400
400
#7BAD9F
oklch(70.8% 0.057 175.3)
-
Step 500
500
#569887
oklch(63.1% 0.073 175.3)
-
Step 600
600
#388271
oklch(55.5% 0.079 175.9)
-
Step 700
700
#2A6E5E
oklch(49% 0.073 175)
-
Step 800
800
#245A4D
oklch(42.7% 0.061 175)
-
Step 900
900
#234A40
oklch(37.7% 0.048 174.9)
-
Step 950
950 (this color)
#213731
oklch(31.6% 0.03 175.2)
#213731 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) | #353431 | 0.031 |
| Deuteranopia (no green cones) | #323231 | 0.029 |
| Tritanopia (no blue cones) | #1B3835 | 0.009 |
| Achromatopsia (no color) | #333333 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213731
#213731
oklch(31.6% 0.03 175.2)
- #3F2C33
#3F2C33
oklch(31.8% 0.03 355.1)
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 #213731, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pakistan Green #283618 ΔE 0.039
- Gunmetal #293241 ΔE 0.041
- Onyx #343A40 ΔE 0.041
- Midnight Green #073B4C ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.060
- Jet #212529 ΔE 0.061
Use #213731 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.