#42456E
Closest named color: Dark Grey Blue (#29465B). oklch(40.7% 0.069 279.7), rgb(66, 69, 110).
Aa
White text reads best on this color (9.09:1).
About this color
#42456E is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.069 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.050 away. White text reads best on it, at 9.09:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.30:1 |
| White text | 9.09:1 |
Values
| HEX | #42456E |
| RGB | rgb(66, 69, 110) |
| HSL | hsl(236, 25%, 35%) |
| OKLCH | oklch(40.7% 0.069 279.7) |
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 #42456E | 9.09:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #42456E | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #42456E text on white | 9.09:1 | AAA | Lc 90.9 | Preferred for body text |
| #42456E text on black | 2.30:1 | Fails | Lc -11.4 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D6D8E8
oklch(88.5% 0.022 280.3)
-
Step 300
300
#BBBEDB
oklch(80.8% 0.041 280.8)
-
Step 400
400
#989DC9
oklch(70.8% 0.064 279.6)
-
Step 500
500
#7F84BB
oklch(63.1% 0.083 279.7)
-
Step 600
600
#696DA7
oklch(55.6% 0.09 280)
-
Step 700
700
#575B8F
oklch(49.1% 0.083 279.5)
-
Step 800
800 (this color)
#42456E
oklch(40.7% 0.069 279.7)
-
Step 900
900
#3C3E5E
oklch(37.7% 0.055 280.7)
-
Step 950
950
#232537
oklch(27.1% 0.034 279)
#42456E 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) | #384A70 | 0.019 |
| Deuteranopia (no green cones) | #35476D | 0.019 |
| Tritanopia (no blue cones) | #354D54 | 0.061 |
| Achromatopsia (no color) | #484848 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42456E
#42456E
oklch(40.7% 0.069 279.7)
- #524A19
#524A19
oklch(40.6% 0.068 100)
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 #42456E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.050
- Dusk #4E5481 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.058
- Twilight #4E518B ΔE 0.059
- Light Navy #155084 ΔE 0.059
- YInMn Blue #415A77 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.062
- Dusty Grape #545775 ΔE 0.063
Use #42456E 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.