#304464
Closest named color: Dark Grey Blue (#29465B). oklch(38.5% 0.061 259.5), rgb(48, 68, 100).
Aa
White text reads best on this color (9.82:1).
About this color
#304464 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.061 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.021 away. White text reads best on it, at 9.82:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.13:1 |
| White text | 9.82:1 |
Values
| HEX | #304464 |
| RGB | rgb(48, 68, 100) |
| HSL | hsl(217, 35%, 29%) |
| OKLCH | oklch(38.5% 0.061 259.5) |
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 #304464 | 9.82:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #304464 | 2.13:1 | Fails | Lc 11.2 | Not readable |
| #304464 text on white | 9.82:1 | AAA | Lc 92.7 | Preferred for body text |
| #304464 text on black | 2.13:1 | Fails | Lc -9.7 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#B0C2DF
oklch(81% 0.046 259.9)
-
Step 400
400
#86A2CE
oklch(70.7% 0.072 259.3)
-
Step 500
500
#688AC2
oklch(63.1% 0.093 260.1)
-
Step 600
600
#4F73AE
oklch(55.5% 0.101 259.9)
-
Step 700
700
#406196
oklch(49.2% 0.094 259.5)
-
Step 800
800
#354F79
oklch(42.7% 0.077 259.6)
-
Step 900
900 (this color)
#304464
oklch(38.5% 0.061 259.5)
-
Step 950
950
#1B2739
oklch(27.1% 0.038 258.3)
#304464 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) | #384665 | 0.013 |
| Deuteranopia (no green cones) | #324163 | 0.009 |
| Tritanopia (no blue cones) | #194B4F | 0.055 |
| Achromatopsia (no color) | #434343 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304464
#304464
oklch(38.5% 0.061 259.5)
- #55401A
#55401A
oklch(38.6% 0.061 80)
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 #304464, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.021
- Charcoal #264653 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.058
- Dark Slate Gray #2F4F4F ΔE 0.058
- Light Navy #155084 ΔE 0.059
Use #304464 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.