#40759D
Closest named color: Dull Blue (#49759C). oklch(54.3% 0.085 243), rgb(64, 117, 157).
Aa
White text reads best on this color (4.94:1).
About this color
#40759D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.085 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.009 away. White text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.24:1 |
| White text | 4.94:1 |
Values
| HEX | #40759D |
| RGB | rgb(64, 117, 157) |
| HSL | hsl(206, 42%, 43%) |
| OKLCH | oklch(54.3% 0.085 243) |
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 #40759D | 4.94:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #40759D | 4.24:1 | AA large text | Lc 30.0 | Non-text elements, placeholder text |
| #40759D text on white | 4.94:1 | AA | Lc 74.1 | Content text, not long reading |
| #40759D text on black | 4.24:1 | AA large text | Lc -27.6 | 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
#ACC4D8
oklch(80.9% 0.039 243.3)
-
Step 400
400
#80A6C4
oklch(70.8% 0.061 242.5)
-
Step 500
500
#5F8FB5
oklch(63.1% 0.078 243.3)
-
Step 600
600 (this color)
#40759D
oklch(54.3% 0.085 243)
-
Step 700
700
#35668A
oklch(49.2% 0.079 242.5)
-
Step 800
800
#2D5370
oklch(42.7% 0.065 243.2)
-
Step 900
900
#28455B
oklch(37.8% 0.052 242.6)
-
Step 950
950
#182835
oklch(26.9% 0.033 243.9)
#40759D 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) | #63759F | 0.041 |
| Deuteranopia (no green cones) | #576C9C | 0.034 |
| Tritanopia (no blue cones) | #007F83 | 0.067 |
| Achromatopsia (no color) | #707070 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40759D
#40759D
oklch(54.3% 0.085 243)
- #926438
#926438
oklch(54.2% 0.084 63.2)
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 #40759D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.009
- Muted Blue #3B719F ΔE 0.014
- Cerulean #457B9D ΔE 0.019
- Flat Blue #3C73A8 ΔE 0.020
- Metallic Blue #4F738E ΔE 0.026
- Stormy Blue #507B9C ΔE 0.026
- Nice Blue #107AB0 ΔE 0.037
- Sea Blue #047495 ΔE 0.037
Use #40759D 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.