#21453B
Closest named color: Dark Teal (#014D4E). oklch(36% 0.046 173.5), rgb(33, 69, 59).
Aa
White text reads best on this color (10.61:1).
About this color
#21453B is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.046 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Teal (#014D4E), ΔE 0.036 away. White text reads best on it, at 10.61:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Teal (#014D4E) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #21453B |
| RGB | rgb(33, 69, 59) |
| HSL | hsl(163, 35%, 20%) |
| OKLCH | oklch(36% 0.046 173.5) |
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 #21453B | 10.61:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #21453B | 1.97:1 | Fails | Lc 9.4 | Not readable |
| #21453B text on white | 10.61:1 | AAA | Lc 94.5 | Preferred for body text |
| #21453B text on black | 1.97:1 | Fails | Lc -8.1 | 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 900.
-
Step 50
50
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E4ECE9
oklch(93.6% 0.009 171.8)
-
Step 200
200
#CDDDD8
oklch(88.4% 0.018 175.3)
-
Step 300
300
#ABC8BF
oklch(80.9% 0.034 174.7)
-
Step 400
400
#7DAC9E
oklch(70.7% 0.054 174.3)
-
Step 500
500
#5A9886
oklch(63.2% 0.07 173.4)
-
Step 600
600
#3D826F
oklch(55.6% 0.077 173)
-
Step 700
700
#2F6E5D
oklch(49.2% 0.071 173)
-
Step 800
800
#28594C
oklch(42.6% 0.058 173.8)
-
Step 900
900 (this color)
#21453B
oklch(36% 0.046 173.5)
-
Step 950
950
#172B25
oklch(27% 0.028 173)
#21453B 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) | #43413B | 0.048 |
| Deuteranopia (no green cones) | #3D3D3C | 0.045 |
| Tritanopia (no blue cones) | #134642 | 0.014 |
| Achromatopsia (no color) | #3F3F3F | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21453B
#21453B
oklch(36% 0.046 173.5)
- #50333F
#50333F
oklch(36% 0.046 353.2)
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 #21453B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Teal #014D4E ΔE 0.036
- Evergreen #05472A ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.042
- Charcoal #264653 ΔE 0.043
- Dark Blue Green #005249 ΔE 0.043
- Onyx #343A40 ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.054
Use #21453B 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.