#304A68
Closest named color: Dark Grey Blue (#29465B). oklch(40.2% 0.06 252.8), rgb(48, 74, 104).
Aa
White text reads best on this color (9.11:1).
About this color
#304A68 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.060 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.026 away. White text reads best on it, at 9.11:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #304A68 |
| RGB | rgb(48, 74, 104) |
| HSL | hsl(212, 37%, 30%) |
| OKLCH | oklch(40.2% 0.06 252.8) |
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 #304A68 | 9.11:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #304A68 | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #304A68 text on white | 9.11:1 | AAA | Lc 90.9 | Preferred for body text |
| #304A68 text on black | 2.30:1 | Fails | Lc -11.4 | 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 800.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B1C3D7
oklch(81% 0.035 251)
-
Step 400
400
#88A3C3
oklch(70.6% 0.056 252.9)
-
Step 500
500
#6A8CB4
oklch(63% 0.072 252.9)
-
Step 600
600
#5176A0
oklch(55.6% 0.078 252.3)
-
Step 700
700
#426389
oklch(49.1% 0.072 252.7)
-
Step 800
800 (this color)
#304A68
oklch(40.2% 0.06 252.8)
-
Step 900
900
#2F435A
oklch(37.6% 0.047 252.5)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#304A68 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) | #3E4B69 | 0.019 |
| Deuteranopia (no green cones) | #374667 | 0.014 |
| Tritanopia (no blue cones) | #145154 | 0.054 |
| Achromatopsia (no color) | #484848 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304A68
#304A68
oklch(40.2% 0.06 252.8)
- #5C4321
#5C4321
oklch(40.2% 0.06 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 #304A68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.026
- Charcoal #264653 ΔE 0.039
- Light Navy #155084 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.053
- Deep Teal #00555A ΔE 0.057
- YInMn Blue #415A77 ΔE 0.058
Use #304A68 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.