#304D7F
Closest named color: Light Navy (#155084). oklch(42.3% 0.091 260.7), rgb(48, 77, 127).
Aa
White text reads best on this color (8.42:1).
About this color
#304D7F is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.091 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.023 away. White text reads best on it, at 8.42:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.49:1 |
| White text | 8.42:1 |
Values
| HEX | #304D7F |
| RGB | rgb(48, 77, 127) |
| HSL | hsl(218, 45%, 34%) |
| OKLCH | oklch(42.3% 0.091 260.7) |
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 #304D7F | 8.42:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #304D7F | 2.49:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #304D7F text on white | 8.42:1 | AAA | Lc 88.9 | Fine for body text |
| #304D7F text on black | 2.49:1 | Fails | Lc -13.4 | 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
#82A1D6
oklch(70.6% 0.085 260.9)
-
Step 500
500
#6389CB
oklch(63% 0.109 261)
-
Step 600
600
#4A72B8
oklch(55.6% 0.118 260.9)
-
Step 700
700
#3B5F9E
oklch(49% 0.11 260.9)
-
Step 800
800 (this color)
#304D7F
oklch(42.3% 0.091 260.7)
-
Step 900
900
#2B4167
oklch(37.6% 0.071 260.8)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#304D7F 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) | #385181 | 0.016 |
| Deuteranopia (no green cones) | #2D4A7E | 0.010 |
| Tritanopia (no blue cones) | #005860 | 0.077 |
| Achromatopsia (no color) | #4D4D4D | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304D7F
#304D7F
oklch(42.3% 0.091 260.7)
- #664800
#664800
oklch(42.3% 0.087 81.3)
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 #304D7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.023
- Dusk Blue #26538D ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.033
- Cobalt #1E488F ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.039
- Twilight Blue #0A437A ΔE 0.048
- Dusk #4E5481 ΔE 0.048
- Twilight #4E518B ΔE 0.048
Use #304D7F 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.