#42485B
Closest named color: Dark Grey Blue (#29465B). oklch(40.4% 0.033 271.2), rgb(66, 72, 91).
Aa
White text reads best on this color (9.09:1).
About this color
#42485B is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.033 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.036 away. White text reads best on it, at 9.09:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.30:1 |
| White text | 9.09:1 |
Values
| HEX | #42485B |
| RGB | rgb(66, 72, 91) |
| HSL | hsl(226, 16%, 31%) |
| OKLCH | oklch(40.4% 0.033 271.2) |
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 #42485B | 9.09:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #42485B | 2.30:1 | Fails | Lc 13.0 | Not readable |
| #42485B text on white | 9.09:1 | AAA | Lc 90.9 | Preferred for body text |
| #42485B 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E0
oklch(88.5% 0.01 267.4)
-
Step 300
300
#BCC0CD
oklch(80.9% 0.019 272.3)
-
Step 400
400
#99A0B4
oklch(70.7% 0.03 270.3)
-
Step 500
500
#8089A2
oklch(63.1% 0.039 269.7)
-
Step 600
600
#6A728D
oklch(55.5% 0.043 272)
-
Step 700
700
#586078
oklch(49.1% 0.04 270.5)
-
Step 800
800 (this color)
#42485B
oklch(40.4% 0.033 271.2)
-
Step 900
900
#3C4150
oklch(37.7% 0.027 270.6)
-
Step 950
950
#23262F
oklch(26.9% 0.017 270.7)
#42485B 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) | #424A5C | 0.006 |
| Deuteranopia (no green cones) | #40475B | 0.005 |
| Tritanopia (no blue cones) | #3C4C4E | 0.031 |
| Achromatopsia (no color) | #484848 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42485B
#42485B
oklch(40.4% 0.033 271.2)
- #4F4834
#4F4834
oklch(40.3% 0.033 91)
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 #42485B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.036
- Charcoal #264653 ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.062
- Onyx #343A40 ΔE 0.063
- Dusty Grape #545775 ΔE 0.065
- Deep Teal #00555A ΔE 0.066
Use #42485B 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.