#40729A
Closest named color: Muted Blue (#3B719F). oklch(53.4% 0.083 244.4), rgb(64, 114, 154).
Aa
White text reads best on this color (5.13:1).
About this color
#40729A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.083 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.010 away. White text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.09:1 |
| White text | 5.13:1 |
Values
| HEX | #40729A |
| RGB | rgb(64, 114, 154) |
| HSL | hsl(207, 41%, 43%) |
| OKLCH | oklch(53.4% 0.083 244.4) |
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 #40729A | 5.13:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #40729A | 4.09:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #40729A text on white | 5.13:1 | AA | Lc 75.2 | Fine for body text |
| #40729A text on black | 4.09:1 | AA large text | Lc -26.5 | 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 600.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ADC4D8
oklch(80.9% 0.038 244.5)
-
Step 400
400
#81A5C4
oklch(70.6% 0.06 244.8)
-
Step 500
500
#618FB5
oklch(63.2% 0.076 244.3)
-
Step 600
600 (this color)
#40729A
oklch(53.4% 0.083 244.4)
-
Step 700
700
#38658A
oklch(49.1% 0.078 245.1)
-
Step 800
800
#2E5370
oklch(42.8% 0.064 243.8)
-
Step 900
900
#2A445A
oklch(37.6% 0.05 245.2)
-
Step 950
950
#192835
oklch(27% 0.032 245.5)
#40729A 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) | #61739C | 0.039 |
| Deuteranopia (no green cones) | #556A99 | 0.031 |
| Tritanopia (no blue cones) | #007C80 | 0.068 |
| Achromatopsia (no color) | #6E6E6E | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40729A
#40729A
oklch(53.4% 0.083 244.4)
- #8F6236
#8F6236
oklch(53.4% 0.084 63.7)
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 #40729A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.010
- Dull Blue #49759C ΔE 0.014
- Flat Blue #3C73A8 ΔE 0.022
- Metallic Blue #4F738E ΔE 0.025
- Cerulean #457B9D ΔE 0.027
- Stormy Blue #507B9C ΔE 0.033
- Ocean Blue #03719C ΔE 0.034
- Sea Blue #047495 ΔE 0.035
Use #40729A 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.