#304351
Closest named color: Charcoal (#264653). oklch(37.3% 0.034 240.7), rgb(48, 67, 81).
Aa
White text reads best on this color (10.25:1).
About this color
#304351 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.034 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.014 away. White text reads best on it, at 10.25:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #304351 |
| RGB | rgb(48, 67, 81) |
| HSL | hsl(205, 26%, 25%) |
| OKLCH | oklch(37.3% 0.034 240.7) |
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 #304351 | 10.25:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #304351 | 2.04:1 | Fails | Lc 10.1 | Not readable |
| #304351 text on white | 10.25:1 | AAA | Lc 93.8 | Preferred for body text |
| #304351 text on black | 2.04:1 | Fails | Lc -8.7 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B3C3D0
oklch(80.9% 0.025 242.4)
-
Step 400
400
#8AA4B8
oklch(70.6% 0.041 241.3)
-
Step 500
500
#6D8EA7
oklch(63.1% 0.053 241.3)
-
Step 600
600
#557892
oklch(55.6% 0.057 241.2)
-
Step 700
700
#45657C
oklch(49.1% 0.053 240.4)
-
Step 800
800
#395265
oklch(42.6% 0.044 241.8)
-
Step 900
900 (this color)
#304351
oklch(37.3% 0.034 240.7)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#304351 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) | #3D4352 | 0.019 |
| Deuteranopia (no green cones) | #393F51 | 0.017 |
| Tritanopia (no blue cones) | #254648 | 0.026 |
| Achromatopsia (no color) | #414141 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304351
#304351
oklch(37.3% 0.034 240.7)
- #4E3C2E
#4E3C2E
oklch(37.2% 0.034 59.3)
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 #304351, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.014
- Dark Grey Blue #29465B ΔE 0.018
- Charcoal Grey #3C4142 ΔE 0.028
- Onyx #343A40 ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.041
- Dark Teal #014D4E ΔE 0.047
- Midnight Green #073B4C ΔE 0.051
Use #304351 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.