#304755
Closest named color: Charcoal (#264653). oklch(38.5% 0.037 235.8), rgb(48, 71, 85).
Aa
White text reads best on this color (9.73:1).
About this color
#304755 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.037 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.013 away. White text reads best on it, at 9.73:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.15:1 |
| White text | 9.73:1 |
Values
| HEX | #304755 |
| RGB | rgb(48, 71, 85) |
| HSL | hsl(203, 28%, 26%) |
| OKLCH | oklch(38.5% 0.037 235.8) |
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 #304755 | 9.73:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #304755 | 2.15:1 | Fails | Lc 11.4 | Not readable |
| #304755 text on white | 9.73:1 | AAA | Lc 92.5 | Preferred for body text |
| #304755 text on black | 2.15:1 | Fails | Lc -9.9 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D0
oklch(80.9% 0.028 234.1)
-
Step 400
400
#86A6B9
oklch(70.8% 0.045 234.3)
-
Step 500
500
#688FA8
oklch(63.1% 0.057 237)
-
Step 600
600
#4E7993
oklch(55.5% 0.063 236)
-
Step 700
700
#3F667D
oklch(49.1% 0.058 235.5)
-
Step 800
800
#345366
oklch(42.6% 0.048 236.4)
-
Step 900
900 (this color)
#304755
oklch(38.5% 0.037 235.8)
-
Step 950
950
#1B2830
oklch(26.9% 0.023 235.8)
#304755 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) | #414656 | 0.024 |
| Deuteranopia (no green cones) | #3B4255 | 0.021 |
| Tritanopia (no blue cones) | #224B4B | 0.030 |
| Achromatopsia (no color) | #444444 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304755
#304755
oklch(38.5% 0.037 235.8)
- #533F30
#533F30
oklch(38.5% 0.037 58.2)
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 #304755, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.013
- Dark Grey Blue #29465B ΔE 0.014
- Dark Slate Gray #2F4F4F ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.034
- Dark Teal #014D4E ΔE 0.043
- Onyx #343A40 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.047
- Deep Teal #00555A ΔE 0.050
Use #304755 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.