#30559E
Closest named color: Dusk Blue (#26538D). oklch(46.2% 0.126 262.4), rgb(48, 85, 158).
Aa
White text reads best on this color (7.19:1).
About this color
#30559E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.126 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.030 away. White text reads best on it, at 7.19:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.91:1 |
| White text | 7.19:1 |
Values
| HEX | #30559E |
| RGB | rgb(48, 85, 158) |
| HSL | hsl(220, 53%, 40%) |
| OKLCH | oklch(46.2% 0.126 262.4) |
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 #30559E | 7.19:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #30559E | 2.91:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #30559E text on white | 7.19:1 | AAA | Lc 84.7 | Fine for body text |
| #30559E 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
#ACC1E9
oklch(80.9% 0.061 263.2)
-
Step 400
400
#80A1DE
oklch(70.8% 0.097 262.3)
-
Step 500
500
#6088D5
oklch(63.2% 0.125 262.5)
-
Step 600
600
#4670C2
oklch(55.5% 0.136 262.4)
-
Step 700
700 (this color)
#30559E
oklch(46.2% 0.126 262.4)
-
Step 800
800
#2F4D88
oklch(42.8% 0.104 262.5)
-
Step 900
900
#29406D
oklch(37.6% 0.083 262.6)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#30559E 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) | #305DA1 | 0.022 |
| Deuteranopia (no green cones) | #1B539D | 0.019 |
| Tritanopia (no blue cones) | #006672 | 0.102 |
| Achromatopsia (no color) | #575757 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30559E
#30559E
oklch(46.2% 0.126 262.4)
- #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 #30559E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.042
- Twilight #4E518B ΔE 0.046
- Dusky Blue #475F94 ΔE 0.046
- Cobalt #1E488F ΔE 0.048
- Light Navy #155084 ΔE 0.051
- Blueberry #464196 ΔE 0.056
Use #30559E 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.