#304671
Closest named color: Twilight Blue (#0A437A). oklch(39.7% 0.078 262.8), rgb(48, 70, 113).
Aa
White text reads best on this color (9.37:1).
About this color
#304671 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.078 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.038 away. White text reads best on it, at 9.37:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.37:1 |
Values
| HEX | #304671 |
| RGB | rgb(48, 70, 113) |
| HSL | hsl(220, 40%, 32%) |
| OKLCH | oklch(39.7% 0.078 262.8) |
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 #304671 | 9.37:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #304671 | 2.24:1 | Fails | Lc 12.4 | Not readable |
| #304671 text on white | 9.37:1 | AAA | Lc 91.5 | Preferred for body text |
| #304671 text on black | 2.24:1 | Fails | Lc -10.8 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ADC1E7
oklch(80.9% 0.058 263.2)
-
Step 400
400
#81A0DC
oklch(70.6% 0.095 263.1)
-
Step 500
500
#6288D2
oklch(63.1% 0.12 262.8)
-
Step 600
600
#4970BF
oklch(55.5% 0.131 263)
-
Step 700
700
#3A5EA5
oklch(49.1% 0.121 262.5)
-
Step 800
800
#304D86
oklch(42.7% 0.101 262.6)
-
Step 900
900 (this color)
#304671
oklch(39.7% 0.078 262.8)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#304671 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) | #354A73 | 0.015 |
| Deuteranopia (no green cones) | #2D4470 | 0.008 |
| Tritanopia (no blue cones) | #0A4F56 | 0.069 |
| Achromatopsia (no color) | #464646 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304671
#304671
oklch(39.7% 0.078 262.8)
- #5B4207
#5B4207
oklch(39.6% 0.078 82.6)
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 #304671, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.040
- Light Navy #155084 ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.050
- Cobalt #1E488F ΔE 0.052
- Dusk Blue #26538D ΔE 0.054
- Charcoal #264653 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.064
Use #304671 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.