#21343F
Closest named color: Gunmetal (#293241). oklch(31.4% 0.032 234.5), rgb(33, 52, 63).
Aa
White text reads best on this color (12.90:1).
About this color
#21343F is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.032 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.014 away. White text reads best on it, at 12.90:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.62:1 |
| White text | 12.90:1 |
Values
| HEX | #21343F |
| RGB | rgb(33, 52, 63) |
| HSL | hsl(202, 31%, 19%) |
| OKLCH | oklch(31.4% 0.032 234.5) |
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 #21343F | 12.90:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #21343F | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #21343F text on white | 12.90:1 | AAA | Lc 99.0 | Preferred for body text |
| #21343F text on black | 1.62:1 | 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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#AAC5D6
oklch(80.9% 0.038 235.6)
-
Step 400
400
#7CA7C1
oklch(70.7% 0.06 235.3)
-
Step 500
500
#5991B1
oklch(63.1% 0.076 234.8)
-
Step 600
600
#3C7B9D
oklch(55.6% 0.084 234.6)
-
Step 700
700
#2E6886
oklch(49.2% 0.077 233.9)
-
Step 800
800
#27556D
oklch(42.8% 0.064 233.8)
-
Step 900
900
#254658
oklch(37.7% 0.05 234)
-
Step 950
950 (this color)
#21343F
oklch(31.4% 0.032 234.5)
#21343F 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) | #2F3340 | 0.021 |
| Deuteranopia (no green cones) | #2B303F | 0.019 |
| Tritanopia (no blue cones) | #153738 | 0.024 |
| Achromatopsia (no color) | #323232 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21343F
#21343F
oklch(31.4% 0.032 234.5)
- #3E2D22
#3E2D22
oklch(31.4% 0.031 54.2)
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 #21343F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.014
- Space Cadet #2B2D42 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.029
- Midnight Green #073B4C ΔE 0.032
- Onyx #343A40 ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.049
- Jet #212529 ΔE 0.056
Use #21343F 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.