#42485E
Closest named color: Dark Grey Blue (#29465B). oklch(40.5% 0.038 272.8), rgb(66, 72, 94).
Aa
White text reads best on this color (9.05:1).
About this color
#42485E is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.038 and its hue 273°. 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 9.05:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.32:1 |
| White text | 9.05:1 |
Values
| HEX | #42485E |
| RGB | rgb(66, 72, 94) |
| HSL | hsl(227, 18%, 31%) |
| OKLCH | oklch(40.5% 0.038 272.8) |
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 #42485E | 9.05:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #42485E | 2.32:1 | Fails | Lc 13.2 | Not readable |
| #42485E text on white | 9.05:1 | AAA | Lc 90.8 | Preferred for body text |
| #42485E text on black | 2.32:1 | Fails | Lc -11.5 | 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
#D6D9E1
oklch(88.5% 0.011 269.5)
-
Step 300
300
#BBC0CF
oklch(80.8% 0.022 271.1)
-
Step 400
400
#99A0B7
oklch(70.8% 0.034 272.1)
-
Step 500
500
#8088A6
oklch(63.1% 0.046 273.3)
-
Step 600
600
#697291
oklch(55.6% 0.049 272.1)
-
Step 700
700
#585F7B
oklch(49% 0.046 273.7)
-
Step 800
800 (this color)
#42485E
oklch(40.5% 0.038 272.8)
-
Step 900
900
#3C4152
oklch(37.8% 0.03 272.1)
-
Step 950
950
#232630
oklch(27% 0.019 272)
#42485E 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) | #414A5F | 0.006 |
| Deuteranopia (no green cones) | #3F485D | 0.005 |
| Tritanopia (no blue cones) | #3B4C4F | 0.034 |
| Achromatopsia (no color) | #494949 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42485E
#42485E
oklch(40.5% 0.038 272.8)
- #504931
#504931
oklch(40.6% 0.038 93.8)
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 #42485E, 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 0.044
- Dark Slate Gray #2F4F4F ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.049
- YInMn Blue #415A77 ΔE 0.060
- Dusty Grape #545775 ΔE 0.062
- Onyx #343A40 ΔE 0.066
- Dusk #4E5481 ΔE 0.066
Use #42485E 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.