#303243
Closest named color: Gunmetal (#293241). oklch(32.3% 0.03 279.3), rgb(48, 50, 67).
Aa
White text reads best on this color (12.62:1).
About this color
#303243 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.030 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.012 away. White text reads best on it, at 12.62:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.66:1 |
| White text | 12.62:1 |
Values
| HEX | #303243 |
| RGB | rgb(48, 50, 67) |
| HSL | hsl(234, 17%, 23%) |
| OKLCH | oklch(32.3% 0.03 279.3) |
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 #303243 | 12.62:1 | AAA | Lc -102.0 | Preferred for body text |
| Black text on #303243 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #303243 text on white | 12.62:1 | AAA | Lc 98.6 | Preferred for body text |
| #303243 text on black | 1.66:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D6D8E7
oklch(88.5% 0.021 279.9)
-
Step 300
300
#BBBFD8
oklch(80.9% 0.035 278.4)
-
Step 400
400
#999DC5
oklch(70.7% 0.058 280.3)
-
Step 500
500
#8085B6
oklch(63.1% 0.074 279.5)
-
Step 600
600
#696EA2
oklch(55.5% 0.081 279.2)
-
Step 700
700
#585C8A
oklch(49.1% 0.074 279.5)
-
Step 800
800
#484B70
oklch(42.6% 0.061 279.9)
-
Step 900
900
#3C3F5B
oklch(37.7% 0.048 279.1)
-
Step 950
950 (this color)
#303243
oklch(32.3% 0.03 279.3)
#303243 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) | #2D3444 | 0.007 |
| Deuteranopia (no green cones) | #2C3243 | 0.007 |
| Tritanopia (no blue cones) | #2B3538 | 0.027 |
| Achromatopsia (no color) | #333333 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303243
#303243
oklch(32.3% 0.03 279.3)
- #373422
#373422
oklch(32.3% 0.03 99.8)
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 #303243, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.012
- Space Cadet #2B2D42 ΔE 0.019
- Onyx #343A40 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.042
- Midnight Green #073B4C ΔE 0.048
- Oxford Blue #1B263B ΔE 0.056
- Charcoal Grey #3C4142 ΔE 0.056
Use #303243 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.