#304E80
Closest named color: Light Navy (#155084). oklch(42.6% 0.091 260.1), rgb(48, 78, 128).
Aa
White text reads best on this color (8.30:1).
About this color
#304E80 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.091 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.022 away. White text reads best on it, at 8.30:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.52:1 |
| White text | 8.30:1 |
Values
| HEX | #304E80 |
| RGB | rgb(48, 78, 128) |
| HSL | hsl(218, 45%, 35%) |
| OKLCH | oklch(42.6% 0.091 260.1) |
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 #304E80 | 8.30:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #304E80 | 2.52:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #304E80 text on white | 8.30:1 | AAA | Lc 88.5 | Fine for body text |
| #304E80 text on black | 2.52:1 | Fails | Lc -13.7 | 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 800.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ADC2E4
oklch(81% 0.053 260)
-
Step 400
400
#82A2D6
oklch(70.8% 0.085 259.9)
-
Step 500
500
#628ACB
oklch(63.2% 0.108 259.8)
-
Step 600
600
#4972B8
oklch(55.5% 0.119 260.5)
-
Step 700
700
#3A609E
oklch(49.2% 0.109 259.7)
-
Step 800
800 (this color)
#304E80
oklch(42.6% 0.091 260.1)
-
Step 900
900
#2B4167
oklch(37.6% 0.071 260.8)
-
Step 950
950
#19263C
oklch(26.8% 0.045 260.5)
#304E80 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) | #395282 | 0.017 |
| Deuteranopia (no green cones) | #2E4B7F | 0.010 |
| Tritanopia (no blue cones) | #005961 | 0.077 |
| Achromatopsia (no color) | #4E4E4E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304E80
#304E80
oklch(42.6% 0.091 260.1)
- #684800
#684800
oklch(42.6% 0.088 79.5)
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 #304E80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.022
- Dusk Blue #26538D ΔE 0.024
- Deep Sea Blue #015482 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.035
- Cobalt #1E488F ΔE 0.038
- Dusk #4E5481 ΔE 0.046
- Twilight #4E518B ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.048
Use #304E80 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.