#40435E
Closest named color: Dark Grey Blue (#29465B). oklch(39.2% 0.046 279.1), rgb(64, 67, 94).
Aa
White text reads best on this color (9.62:1).
About this color
#40435E is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.046 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.033 away. White text reads best on it, at 9.62:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.18:1 |
| White text | 9.62:1 |
Values
| HEX | #40435E |
| RGB | rgb(64, 67, 94) |
| HSL | hsl(234, 19%, 31%) |
| OKLCH | oklch(39.2% 0.046 279.1) |
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 #40435E | 9.62:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #40435E | 2.18:1 | Fails | Lc 11.7 | Not readable |
| #40435E text on white | 9.62:1 | AAA | Lc 92.3 | Preferred for body text |
| #40435E text on black | 2.18:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D6D8E6
oklch(88.5% 0.019 279.5)
-
Step 300
300
#BBBFD7
oklch(80.9% 0.034 278.1)
-
Step 400
400
#999EC3
oklch(70.8% 0.054 278.9)
-
Step 500
500
#8085B4
oklch(63% 0.071 279.4)
-
Step 600
600
#6A6FA0
oklch(55.7% 0.076 279.1)
-
Step 700
700
#585C89
oklch(49% 0.072 279.5)
-
Step 800
800
#484C6F
oklch(42.8% 0.058 278.6)
-
Step 900
900 (this color)
#40435E
oklch(39.2% 0.046 279.1)
-
Step 950
950
#232535
oklch(27% 0.03 278.7)
#40435E 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) | #3B465F | 0.011 |
| Deuteranopia (no green cones) | #3A445D | 0.010 |
| Tritanopia (no blue cones) | #38484C | 0.041 |
| Achromatopsia (no color) | #454545 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40435E
#40435E
oklch(39.2% 0.046 279.1)
- #4B4629
#4B4629
oklch(39.1% 0.045 99.7)
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 #40435E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal #264653 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.057
- Onyx #343A40 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.071
- Twilight Blue #0A437A ΔE 0.071
Use #40435E 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.