#304366
Closest named color: Dark Grey Blue (#29465B). oklch(38.4% 0.065 262), rgb(48, 67, 102).
Aa
White text reads best on this color (9.90:1).
About this color
#304366 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.065 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 9.90:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.12:1 |
| White text | 9.90:1 |
Values
| HEX | #304366 |
| RGB | rgb(48, 67, 102) |
| HSL | hsl(219, 36%, 29%) |
| OKLCH | oklch(38.4% 0.065 262) |
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 #304366 | 9.90:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #304366 | 2.12:1 | Fails | Lc 11.0 | Not readable |
| #304366 text on white | 9.90:1 | AAA | Lc 92.9 | Preferred for body text |
| #304366 text on black | 2.12:1 | Fails | Lc -9.6 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0DAEC
oklch(88.6% 0.027 262.3)
-
Step 300
300
#B0C1E1
oklch(80.9% 0.049 263.1)
-
Step 400
400
#86A1D2
oklch(70.7% 0.078 262.1)
-
Step 500
500
#6889C6
oklch(63.1% 0.1 262.1)
-
Step 600
600
#5072B2
oklch(55.6% 0.108 262.2)
-
Step 700
700
#405F9A
oklch(49% 0.102 262.3)
-
Step 800
800
#354E7C
oklch(42.6% 0.083 261.8)
-
Step 900
900 (this color)
#304366
oklch(38.4% 0.065 262)
-
Step 950
950
#1B263B
oklch(26.9% 0.042 262.7)
#304366 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) | #364667 | 0.013 |
| Deuteranopia (no green cones) | #2F4165 | 0.006 |
| Tritanopia (no blue cones) | #184B50 | 0.058 |
| Achromatopsia (no color) | #434343 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304366
#304366
oklch(38.4% 0.065 262)
- #554015
#554015
oklch(38.5% 0.065 82.3)
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 #304366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.040
- Twilight Blue #0A437A ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.056
- Light Navy #155084 ΔE 0.058
- Marine Blue #01386A ΔE 0.059
- Charcoal Grey #3C4142 ΔE 0.062
Use #304366 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.