#304069
Closest named color: Dark Grey Blue (#29465B). oklch(37.8% 0.073 266.8), rgb(48, 64, 105).
Aa
White text reads best on this color (10.17:1).
About this color
#304069 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.073 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.036 away. White text reads best on it, at 10.17:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.06:1 |
| White text | 10.17:1 |
Values
| HEX | #304069 |
| RGB | rgb(48, 64, 105) |
| HSL | hsl(223, 37%, 30%) |
| OKLCH | oklch(37.8% 0.073 266.8) |
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 #304069 | 10.17:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #304069 | 2.06:1 | Fails | Lc 10.4 | Not readable |
| #304069 text on white | 10.17:1 | AAA | Lc 93.5 | Preferred for body text |
| #304069 text on black | 2.06:1 | Fails | Lc -9.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B0C0E5
oklch(80.8% 0.055 266.7)
-
Step 400
400
#889FD8
oklch(70.7% 0.088 267.2)
-
Step 500
500
#6A87CE
oklch(63.2% 0.113 266.4)
-
Step 600
600
#526FBB
oklch(55.5% 0.123 266.7)
-
Step 700
700
#435DA1
oklch(49.2% 0.113 266.5)
-
Step 800
800
#374C82
oklch(42.7% 0.094 266.5)
-
Step 900
900 (this color)
#304069
oklch(37.8% 0.073 266.8)
-
Step 950
950
#1C253D
oklch(26.9% 0.047 267.6)
#304069 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) | #30446B | 0.012 |
| Deuteranopia (no green cones) | #2A3F68 | 0.009 |
| Tritanopia (no blue cones) | #16494F | 0.066 |
| Achromatopsia (no color) | #414141 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304069
#304069
oklch(37.8% 0.073 266.8)
- #533F06
#533F06
oklch(37.9% 0.074 87.1)
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 #304069, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.036
- Twilight Blue #0A437A ΔE 0.041
- Charcoal #264653 ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.052
- Marine Blue #01386A ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.056
- Light Navy #155084 ΔE 0.060
- Cobalt #1E488F ΔE 0.065
Use #304069 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.