#304574
Closest named color: Twilight Blue (#0A437A). oklch(39.7% 0.084 264.7), rgb(48, 69, 116).
Aa
White text reads best on this color (9.42:1).
About this color
#304574 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.084 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.035 away. White text reads best on it, at 9.42:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.22:1 |
| White text | 9.42:1 |
Values
| HEX | #304574 |
| RGB | rgb(48, 69, 116) |
| HSL | hsl(221, 41%, 32%) |
| OKLCH | oklch(39.7% 0.084 264.7) |
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 #304574 | 9.42:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #304574 | 2.22:1 | Fails | Lc 12.3 | Not readable |
| #304574 text on white | 9.42:1 | AAA | Lc 91.6 | Preferred for body text |
| #304574 text on black | 2.22:1 | Fails | Lc -10.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ADC1EA
oklch(81% 0.062 264.6)
-
Step 400
400
#81A0E0
oklch(70.8% 0.1 264.1)
-
Step 500
500
#6286D7
oklch(63% 0.129 264.8)
-
Step 600
600
#4A6FC5
oklch(55.7% 0.14 264.7)
-
Step 700
700
#3B5CAA
oklch(49.1% 0.131 264.8)
-
Step 800
800
#314C8A
oklch(42.8% 0.108 264.6)
-
Step 900
900 (this color)
#304574
oklch(39.7% 0.084 264.7)
-
Step 950
950
#192540
oklch(26.8% 0.053 264.9)
#304574 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) | #324976 | 0.013 |
| Deuteranopia (no green cones) | #294373 | 0.011 |
| Tritanopia (no blue cones) | #044F57 | 0.074 |
| Achromatopsia (no color) | #464646 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304574
#304574
oklch(39.7% 0.084 264.7)
- #5B4200
#5B4200
oklch(39.6% 0.081 84.1)
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 #304574, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Light Navy #155084 ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.046
- Cobalt #1E488F ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.050
- Dusk Blue #26538D ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.058
- Charcoal #264653 ΔE 0.061
Use #304574 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.