#40506C
Closest named color: YInMn Blue (#415A77). oklch(43% 0.051 261.4), rgb(64, 80, 108).
Aa
White text reads best on this color (8.13:1).
About this color
#40506C is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.051 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.032 away. White text reads best on it, at 8.13:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.58:1 |
| White text | 8.13:1 |
Values
| HEX | #40506C |
| RGB | rgb(64, 80, 108) |
| HSL | hsl(218, 26%, 34%) |
| OKLCH | oklch(43% 0.051 261.4) |
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 #40506C | 8.13:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #40506C | 2.58:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #40506C text on white | 8.13:1 | AAA | Lc 88.1 | Fine for body text |
| #40506C text on black | 2.58:1 | Fails | Lc -14.0 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E4
oklch(88.4% 0.016 262.7)
-
Step 300
300
#B6C1D4
oklch(80.8% 0.029 261.5)
-
Step 400
400
#90A1BF
oklch(70.6% 0.048 261.8)
-
Step 500
500
#758AAF
oklch(63.1% 0.061 261.6)
-
Step 600
600
#5E749B
oklch(55.7% 0.066 261.6)
-
Step 700
700
#4D6184
oklch(49.1% 0.062 261.3)
-
Step 800
800 (this color)
#40506C
oklch(43% 0.051 261.4)
-
Step 900
900
#364257
oklch(37.7% 0.039 261.5)
-
Step 950
950
#202733
oklch(27.1% 0.025 261.1)
#40506C 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) | #46526D | 0.011 |
| Deuteranopia (no green cones) | #424E6B | 0.006 |
| Tritanopia (no blue cones) | #32565A | 0.045 |
| Achromatopsia (no color) | #4F4F4F | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40506C
#40506C
oklch(43% 0.051 261.4)
- #5E4D2E
#5E4D2E
oklch(43% 0.051 81.7)
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 #40506C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.032
- Dusty Grape #545775 ΔE 0.040
- Dusk #4E5481 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.052
- Light Navy #155084 ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.056
Use #40506C 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.