#21353E
Closest named color: Gunmetal (#293241). oklch(31.6% 0.03 228), rgb(33, 53, 62).
Aa
White text reads best on this color (12.77:1).
About this color
#21353E is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.030 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.017 away. White text reads best on it, at 12.77:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.64:1 |
| White text | 12.77:1 |
Values
| HEX | #21353E |
| RGB | rgb(33, 53, 62) |
| HSL | hsl(199, 31%, 19%) |
| OKLCH | oklch(31.6% 0.03 228) |
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 #21353E | 12.77:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #21353E | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #21353E text on white | 12.77:1 | AAA | Lc 98.8 | Preferred for body text |
| #21353E text on black | 1.64:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A9C6D3
oklch(80.9% 0.036 226.7)
-
Step 400
400
#7BA8BD
oklch(70.7% 0.057 228.4)
-
Step 500
500
#5792AC
oklch(63% 0.073 228.1)
-
Step 600
600
#3A7C98
oklch(55.5% 0.08 228.5)
-
Step 700
700
#2B6982
oklch(49.2% 0.074 227.8)
-
Step 800
800
#255569
oklch(42.5% 0.061 228.1)
-
Step 900
900
#244756
oklch(37.8% 0.048 227.9)
-
Step 950
950 (this color)
#21353E
oklch(31.6% 0.03 228)
#21353E 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) | #30343E | 0.022 |
| Deuteranopia (no green cones) | #2C313E | 0.020 |
| Tritanopia (no blue cones) | #153838 | 0.022 |
| Achromatopsia (no color) | #323232 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21353E
#21353E
oklch(31.6% 0.03 228)
- #3F2D24
#3F2D24
oklch(31.5% 0.031 47.7)
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 #21353E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.029
- Midnight Green #073B4C ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.032
- Onyx #343A40 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.053
- Jet #212529 ΔE 0.058
Use #21353E 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.