#40536F
Closest named color: YInMn Blue (#415A77). oklch(43.8% 0.052 257.9), rgb(64, 83, 111).
Aa
White text reads best on this color (7.82:1).
About this color
#40536F is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.052 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.022 away. White text reads best on it, at 7.82:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.68:1 |
| White text | 7.82:1 |
Values
| HEX | #40536F |
| RGB | rgb(64, 83, 111) |
| HSL | hsl(216, 27%, 34%) |
| OKLCH | oklch(43.8% 0.052 257.9) |
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 #40536F | 7.82:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #40536F | 2.68:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #40536F text on white | 7.82:1 | AAA | Lc 87.1 | Fine for body text |
| #40536F text on black | 2.68:1 | Fails | Lc -15.0 | 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
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE5
oklch(88.6% 0.017 256.3)
-
Step 300
300
#B5C2D5
oklch(81% 0.03 257.8)
-
Step 400
400
#8EA2BF
oklch(70.7% 0.048 257.6)
-
Step 500
500
#728BB0
oklch(63.1% 0.063 258.1)
-
Step 600
600
#5A759B
oklch(55.7% 0.067 257)
-
Step 700
700
#4A6285
oklch(49.2% 0.064 257.7)
-
Step 800
800 (this color)
#40536F
oklch(43.8% 0.052 257.9)
-
Step 900
900
#344257
oklch(37.6% 0.041 258.3)
-
Step 950
950
#1F2733
oklch(27.1% 0.025 258.3)
#40536F 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) | #495470 | 0.013 |
| Deuteranopia (no green cones) | #44506E | 0.010 |
| Tritanopia (no blue cones) | #30595D | 0.045 |
| Achromatopsia (no color) | #525252 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40536F
#40536F
oklch(43.8% 0.052 257.9)
- #624F30
#624F30
oklch(43.9% 0.052 79)
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 #40536F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.022
- Dusty Grape #545775 ΔE 0.034
- Dusk #4E5481 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.044
- Twilight #4E518B ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.055
- Light Navy #155084 ΔE 0.056
- Dusk Blue #26538D ΔE 0.056
Use #40536F 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.