#42489D
Closest named color: Blueberry (#464196). oklch(44.4% 0.136 276.3), rgb(66, 72, 157).
Aa
White text reads best on this color (7.93:1).
About this color
#42489D is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.136 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.020 away. White text reads best on it, at 7.93:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.64:1 |
| White text | 7.93:1 |
Values
| HEX | #42489D |
| RGB | rgb(66, 72, 157) |
| HSL | hsl(236, 41%, 44%) |
| OKLCH | oklch(44.4% 0.136 276.3) |
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 #42489D | 7.93:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #42489D | 2.64:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #42489D text on white | 7.93:1 | AAA | Lc 87.3 | Fine for body text |
| #42489D text on black | 2.64:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D1D7F7
oklch(88.5% 0.044 277.1)
-
Step 300
300
#B2BDF4
oklch(80.9% 0.079 275.7)
-
Step 400
400
#8C98EF
oklch(70.6% 0.128 276.6)
-
Step 500
500
#717CEA
oklch(63% 0.164 276.3)
-
Step 600
600
#5B63D8
oklch(55.6% 0.177 276.1)
-
Step 700
700
#4C51BB
oklch(49.1% 0.164 276.5)
-
Step 800
800 (this color)
#42489D
oklch(44.4% 0.136 276.3)
-
Step 900
900
#343979
oklch(37.6% 0.107 276.6)
-
Step 950
950
#1E2247
oklch(27% 0.068 276.2)
#42489D 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) | #1555A0 | 0.050 |
| Deuteranopia (no green cones) | #004D9B | 0.054 |
| Tritanopia (no blue cones) | #0A5B6B | 0.119 |
| Achromatopsia (no color) | #515151 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42489D
#42489D
oklch(44.4% 0.136 276.3)
- #635300
#635300
oklch(44.5% 0.092 96.2)
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 #42489D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.020
- Dark Slate Blue #483D8B ΔE 0.039
- Twilight #4E518B ΔE 0.046
- Cobalt #1E488F ΔE 0.048
- Dusk Blue #26538D ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.058
- Dusk #4E5481 ΔE 0.065
- Sapphire #2138AB ΔE 0.065
Use #42489D 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.