#30508C
Closest named color: Dusk Blue (#26538D). oklch(43.8% 0.106 261.8), rgb(48, 80, 140).
Aa
White text reads best on this color (7.91:1).
About this color
#30508C is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.106 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.012 away. White text reads best on it, at 7.91:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #30508C |
| RGB | rgb(48, 80, 140) |
| HSL | hsl(219, 49%, 37%) |
| OKLCH | oklch(43.8% 0.106 261.8) |
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 #30508C | 7.91:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #30508C | 2.65:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #30508C text on white | 7.91:1 | AAA | Lc 87.2 | Fine for body text |
| #30508C text on black | 2.65:1 | Fails | Lc -14.9 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1EA
oklch(80.8% 0.063 262.8)
-
Step 400
400
#7EA1DF
oklch(70.8% 0.099 261.5)
-
Step 500
500
#5E88D6
oklch(63.1% 0.127 261.9)
-
Step 600
600
#4470C3
oklch(55.5% 0.138 261.9)
-
Step 700
700
#365EA9
oklch(49.2% 0.128 261.7)
-
Step 800
800 (this color)
#30508C
oklch(43.8% 0.106 261.8)
-
Step 900
900
#28406D
oklch(37.6% 0.083 262)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#30508C 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) | #35568E | 0.019 |
| Deuteranopia (no green cones) | #274D8B | 0.014 |
| Tritanopia (no blue cones) | #005E67 | 0.089 |
| Achromatopsia (no color) | #515151 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30508C
#30508C
oklch(43.8% 0.106 261.8)
- #6B4C00
#6B4C00
oklch(43.9% 0.09 81.6)
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 #30508C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.012
- Light Navy #155084 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.032
- Cobalt #1E488F ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.037
- Twilight #4E518B ΔE 0.040
- Dusk #4E5481 ΔE 0.046
Use #30508C 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.