#42495E
Closest named color: Dark Grey Blue (#29465B). oklch(40.8% 0.037 270.4), rgb(66, 73, 94).
Aa
White text reads best on this color (8.95:1).
About this color
#42495E is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.037 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.037 away. White text reads best on it, at 8.95:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.34:1 |
| White text | 8.95:1 |
Values
| HEX | #42495E |
| RGB | rgb(66, 73, 94) |
| HSL | hsl(225, 18%, 31%) |
| OKLCH | oklch(40.8% 0.037 270.4) |
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 #42495E | 8.95:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #42495E | 2.34:1 | Fails | Lc 13.4 | Not readable |
| #42495E text on white | 8.95:1 | AAA | Lc 90.5 | Preferred for body text |
| #42495E text on black | 2.34:1 | Fails | Lc -11.8 | 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
#98A0B7
oklch(70.7% 0.035 270.3)
-
Step 500
500
#7F89A5
oklch(63.2% 0.044 269.7)
-
Step 600
600
#687290
oklch(55.5% 0.048 270.4)
-
Step 700
700
#57607A
oklch(49.1% 0.043 269.9)
-
Step 800
800 (this color)
#42495E
oklch(40.8% 0.037 270.4)
-
Step 900
900
#3C4151
oklch(37.7% 0.028 271.4)
-
Step 950
950
#23262F
oklch(26.9% 0.017 270.7)
#42495E 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) | #434B5F | 0.006 |
| Deuteranopia (no green cones) | #40485D | 0.005 |
| Tritanopia (no blue cones) | #3B4D50 | 0.033 |
| Achromatopsia (no color) | #494949 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42495E
#42495E
oklch(40.8% 0.037 270.4)
- #514933
#514933
oklch(40.7% 0.036 90.4)
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 #42495E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.037
- Charcoal #264653 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.058
- Dusty Grape #545775 ΔE 0.060
- Dusk #4E5481 ΔE 0.065
- Deep Teal #00555A ΔE 0.066
Use #42495E 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.