#40596B
Closest named color: YInMn Blue (#415A77). oklch(45.1% 0.042 240.2), rgb(64, 89, 107).
Aa
White text reads best on this color (7.34:1).
About this color
#40596B is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.042 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.020 away. White text reads best on it, at 7.34:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.85:1 |
| White text | 7.34:1 |
Values
| HEX | #40596B |
| RGB | rgb(64, 89, 107) |
| HSL | hsl(205, 25%, 34%) |
| OKLCH | oklch(45.1% 0.042 240.2) |
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 #40596B | 7.34:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #40596B | 2.85:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #40596B text on white | 7.34:1 | AAA | Lc 85.5 | Fine for body text |
| #40596B text on black | 2.85:1 | Fails | Lc -16.5 | Dividers and decoration only |
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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D1DBE1
oklch(88.6% 0.014 233.8)
-
Step 300
300
#B3C3CF
oklch(80.9% 0.024 240.2)
-
Step 400
400
#8BA4B7
oklch(70.6% 0.039 240.9)
-
Step 500
500
#6E8EA5
oklch(63.1% 0.05 239.8)
-
Step 600
600
#567891
oklch(55.7% 0.055 240.8)
-
Step 700
700
#46657B
oklch(49.2% 0.051 240)
-
Step 800
800 (this color)
#40596B
oklch(45.1% 0.042 240.2)
-
Step 900
900
#324452
oklch(37.7% 0.033 242.1)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#40596B 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) | #51596C | 0.024 |
| Deuteranopia (no green cones) | #4B546B | 0.020 |
| Tritanopia (no blue cones) | #315D5F | 0.033 |
| Achromatopsia (no color) | #565656 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40596B
#40596B
oklch(45.1% 0.042 240.2)
- #67503E
#67503E
oklch(45% 0.042 59.5)
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 #40596B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.020
- Dusty Grape #545775 ΔE 0.035
- Slate #516572 ΔE 0.045
- Petrol #005F6A ΔE 0.047
- Dusk #4E5481 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.050
- Denim #3B638C ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.057
Use #40596B 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.