#304152
Closest named color: Charcoal (#264653). oklch(36.8% 0.037 248.9), rgb(48, 65, 82).
Aa
White text reads best on this color (10.48:1).
About this color
#304152 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.037 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.019 away. White text reads best on it, at 10.48:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.00:1 |
| White text | 10.48:1 |
Values
| HEX | #304152 |
| RGB | rgb(48, 65, 82) |
| HSL | hsl(210, 26%, 25%) |
| OKLCH | oklch(36.8% 0.037 248.9) |
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 #304152 | 10.48:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #304152 | 2.00:1 | Fails | Lc 9.6 | Not readable |
| #304152 text on white | 10.48:1 | AAA | Lc 94.3 | Preferred for body text |
| #304152 text on black | 2.00:1 | Fails | Lc -8.3 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B3C3D2
oklch(81% 0.028 246.4)
-
Step 400
400
#8CA3BB
oklch(70.6% 0.044 249.6)
-
Step 500
500
#6F8DAB
oklch(63.2% 0.057 248.7)
-
Step 600
600
#577796
oklch(55.7% 0.061 248.2)
-
Step 700
700
#476480
oklch(49.2% 0.057 248.2)
-
Step 800
800
#3B5168
oklch(42.7% 0.047 250.1)
-
Step 900
900 (this color)
#304152
oklch(36.8% 0.037 248.9)
-
Step 950
950
#1E2831
oklch(27.1% 0.022 245.9)
#304152 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) | #3A4153 | 0.015 |
| Deuteranopia (no green cones) | #363E52 | 0.012 |
| Tritanopia (no blue cones) | #244547 | 0.031 |
| Achromatopsia (no color) | #3F3F3F | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304152
#304152
oklch(36.8% 0.037 248.9)
- #4C3C2A
#4C3C2A
oklch(36.8% 0.037 69.6)
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 #304152, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.019
- Dark Grey Blue #29465B ΔE 0.019
- Charcoal Grey #3C4142 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.032
- Onyx #343A40 ΔE 0.033
- Dark Slate Gray #2F4F4F ΔE 0.048
- Midnight Green #073B4C ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.051
Use #304152 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.