#40657F
Closest named color: Denim (#3B638C). oklch(49% 0.06 240.2), rgb(64, 101, 127).
Aa
White text reads best on this color (6.20:1).
About this color
#40657F is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.060 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.024 away. White text reads best on it, at 6.20:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.38:1 |
| White text | 6.20:1 |
Values
| HEX | #40657F |
| RGB | rgb(64, 101, 127) |
| HSL | hsl(205, 33%, 37%) |
| OKLCH | oklch(49% 0.06 240.2) |
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 #40657F | 6.20:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #40657F | 3.38:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #40657F text on white | 6.20:1 | AA | Lc 80.8 | Fine for body text |
| #40657F text on black | 3.38:1 | AA large text | Lc -21.0 | 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 700.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE3
oklch(88.5% 0.016 239.1)
-
Step 300
300
#B1C4D2
oklch(81% 0.029 239.7)
-
Step 400
400
#87A5BB
oklch(70.7% 0.046 240.1)
-
Step 500
500
#698FAA
oklch(63.2% 0.059 239.8)
-
Step 600
600
#507995
oklch(55.7% 0.063 239.2)
-
Step 700
700 (this color)
#40657F
oklch(49% 0.06 240.2)
-
Step 800
800
#355367
oklch(42.7% 0.049 238.6)
-
Step 900
900
#2F4454
oklch(37.6% 0.038 241.8)
-
Step 950
950
#1C2831
oklch(27% 0.024 241.1)
#40657F 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) | #5A6580 | 0.034 |
| Deuteranopia (no green cones) | #515E7F | 0.028 |
| Tritanopia (no blue cones) | #236B6E | 0.047 |
| Achromatopsia (no color) | #616161 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40657F
#40657F
oklch(49% 0.06 240.2)
- #7A583D
#7A583D
oklch(49% 0.06 59.2)
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 #40657F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.024
- Slate #516572 ΔE 0.028
- YInMn Blue #415A77 ΔE 0.033
- Dusky Blue #475F94 ΔE 0.044
- Dusty Grape #545775 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.046
- Peacock Blue #016795 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.049
Use #40657F 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.