#304E7D
Closest named color: Light Navy (#155084). oklch(42.4% 0.087 259.1), rgb(48, 78, 125).
Aa
White text reads best on this color (8.36:1).
About this color
#304E7D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.087 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.024 away. White text reads best on it, at 8.36:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.51:1 |
| White text | 8.36:1 |
Values
| HEX | #304E7D |
| RGB | rgb(48, 78, 125) |
| HSL | hsl(217, 45%, 34%) |
| OKLCH | oklch(42.4% 0.087 259.1) |
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 #304E7D | 8.36:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #304E7D | 2.51:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #304E7D text on white | 8.36:1 | AAA | Lc 88.7 | Fine for body text |
| #304E7D text on black | 2.51:1 | Fails | Lc -13.5 | 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
#CEDAEC
oklch(88.5% 0.028 258.4)
-
Step 300
300
#ADC2E2
oklch(80.9% 0.051 258.7)
-
Step 400
400
#82A2D3
oklch(70.7% 0.081 258.7)
-
Step 500
500
#638AC8
oklch(63.1% 0.104 259.4)
-
Step 600
600
#4973B4
oklch(55.5% 0.112 258.8)
-
Step 700
700
#3B609B
oklch(49% 0.104 259.4)
-
Step 800
800 (this color)
#304E7D
oklch(42.4% 0.087 259.1)
-
Step 900
900
#2B4265
oklch(37.7% 0.067 258.5)
-
Step 950
950
#1A273B
oklch(27.1% 0.042 258.8)
#304E7D 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) | #3A527F | 0.018 |
| Deuteranopia (no green cones) | #304A7C | 0.012 |
| Tritanopia (no blue cones) | #00595F | 0.076 |
| Achromatopsia (no color) | #4E4E4E | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304E7D
#304E7D
oklch(42.4% 0.087 259.1)
- #674703
#674703
oklch(42.3% 0.086 78.6)
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 #304E7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.024
- Dusk Blue #26538D ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.037
- Cobalt #1E488F ΔE 0.042
- Dusk #4E5481 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.047
- Twilight #4E518B ΔE 0.049
Use #304E7D 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.