#304256
Closest named color: Dark Grey Blue (#29465B). oklch(37.3% 0.042 251.6), rgb(48, 66, 86).
Aa
White text reads best on this color (10.29:1).
About this color
#304256 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.042 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.015 away. White text reads best on it, at 10.29:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.29:1 |
Values
| HEX | #304256 |
| RGB | rgb(48, 66, 86) |
| HSL | hsl(212, 28%, 26%) |
| OKLCH | oklch(37.3% 0.042 251.6) |
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 #304256 | 10.29:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #304256 | 2.03:1 | Fails | Lc 10.1 | Not readable |
| #304256 text on white | 10.29:1 | AAA | Lc 93.9 | Preferred for body text |
| #304256 text on black | 2.03:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D1DAE5
oklch(88.5% 0.018 253.4)
-
Step 300
300
#B2C2D5
oklch(80.8% 0.032 252.7)
-
Step 400
400
#8AA3BF
oklch(70.6% 0.05 251.4)
-
Step 500
500
#6D8CAF
oklch(63% 0.064 251.9)
-
Step 600
600
#55769B
oklch(55.6% 0.069 251.9)
-
Step 700
700
#456384
oklch(49% 0.064 251.5)
-
Step 800
800
#39516C
oklch(42.7% 0.054 252)
-
Step 900
900 (this color)
#304256
oklch(37.3% 0.042 251.6)
-
Step 950
950
#1D2733
oklch(26.9% 0.027 253.3)
#304256 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) | #3A4357 | 0.015 |
| Deuteranopia (no green cones) | #363F56 | 0.012 |
| Tritanopia (no blue cones) | #224749 | 0.037 |
| Achromatopsia (no color) | #404040 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304256
#304256
oklch(37.3% 0.042 251.6)
- #4E3D27
#4E3D27
oklch(37.2% 0.042 73.1)
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 #304256, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.015
- Charcoal #264653 ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.037
- Onyx #343A40 ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.048
- Midnight Green #073B4C ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.052
Use #304256 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.