#30559D
Closest named color: Dusk Blue (#26538D). oklch(46.1% 0.125 262.2), rgb(48, 85, 157).
Aa
White text reads best on this color (7.21:1).
About this color
#30559D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.125 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.029 away. White text reads best on it, at 7.21:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.91:1 |
| White text | 7.21:1 |
Values
| HEX | #30559D |
| RGB | rgb(48, 85, 157) |
| HSL | hsl(220, 53%, 40%) |
| OKLCH | oklch(46.1% 0.125 262.2) |
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 #30559D | 7.21:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #30559D | 2.91:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #30559D text on white | 7.21:1 | AAA | Lc 84.7 | Fine for body text |
| #30559D text on black | 2.91:1 | Fails | Lc -17.3 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CDDAF0
oklch(88.5% 0.033 261)
-
Step 300
300
#ACC1E8
oklch(80.8% 0.06 262.8)
-
Step 400
400
#80A1DD
oklch(70.8% 0.096 262)
-
Step 500
500
#6088D4
oklch(63.1% 0.123 262.3)
-
Step 600
600
#4770C1
oklch(55.5% 0.134 262.6)
-
Step 700
700 (this color)
#30559D
oklch(46.1% 0.125 262.2)
-
Step 800
800
#2F4D87
oklch(42.7% 0.103 262.3)
-
Step 900
900
#29406C
oklch(37.6% 0.081 262.3)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#30559D 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) | #315DA0 | 0.023 |
| Deuteranopia (no green cones) | #1D529C | 0.020 |
| Tritanopia (no blue cones) | #006671 | 0.102 |
| Achromatopsia (no color) | #575757 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30559D
#30559D
oklch(46.1% 0.125 262.2)
- #725200
#725200
oklch(46.1% 0.095 82.4)
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 #30559D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.029
- Denim Blue #3B5B92 ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.040
- Twilight #4E518B ΔE 0.045
- Dusky Blue #475F94 ΔE 0.046
- Cobalt #1E488F ΔE 0.047
- Light Navy #155084 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.056
Use #30559D 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.