#40536B
Closest named color: YInMn Blue (#415A77). oklch(43.6% 0.046 254.5), rgb(64, 83, 107).
Aa
White text reads best on this color (7.87:1).
About this color
#40536B is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.046 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.026 away. White text reads best on it, at 7.87:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #40536B |
| RGB | rgb(64, 83, 107) |
| HSL | hsl(213, 25%, 34%) |
| OKLCH | oklch(43.6% 0.046 254.5) |
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 #40536B | 7.87:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #40536B | 2.66:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #40536B text on white | 7.87:1 | AAA | Lc 87.3 | Fine for body text |
| #40536B text on black | 2.66:1 | Fails | Lc -14.8 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D3DAE3
oklch(88.6% 0.015 254.6)
-
Step 300
300
#B5C2D2
oklch(80.9% 0.027 253.6)
-
Step 400
400
#8FA2BC
oklch(70.6% 0.044 256.3)
-
Step 500
500
#738CAB
oklch(63.2% 0.055 254)
-
Step 600
600
#5B7596
oklch(55.5% 0.06 254.7)
-
Step 700
700
#4B6280
oklch(49% 0.056 255.3)
-
Step 800
800 (this color)
#40536B
oklch(43.6% 0.046 254.5)
-
Step 900
900
#344355
oklch(37.7% 0.037 253.3)
-
Step 950
950
#1F2732
oklch(27% 0.024 256.4)
#40536B 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) | #4A546C | 0.015 |
| Deuteranopia (no green cones) | #45506A | 0.011 |
| Tritanopia (no blue cones) | #32585B | 0.040 |
| Achromatopsia (no color) | #525252 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40536B
#40536B
oklch(43.6% 0.046 254.5)
- #614E34
#614E34
oklch(43.7% 0.047 74.8)
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 #40536B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.026
- Dusty Grape #545775 ΔE 0.036
- Dusk #4E5481 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.054
- Petrol #005F6A ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.058
Use #40536B 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.