#407BA5
Closest named color: Cerulean (#457B9D). oklch(56.1% 0.09 241.8), rgb(64, 123, 165).
Aa
Black text reads best on this color (4.59:1).
About this color
#407BA5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.090 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.013 away. Black text reads best on it, at 4.59:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.59:1 |
| White text | 4.57:1 |
Values
| HEX | #407BA5 |
| RGB | rgb(64, 123, 165) |
| HSL | hsl(205, 44%, 45%) |
| OKLCH | oklch(56.1% 0.09 241.8) |
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 #407BA5 | 4.57:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #407BA5 | 4.59:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #407BA5 text on white | 4.57:1 | AA | Lc 71.6 | Content text, not long reading |
| #407BA5 text on black | 4.59:1 | AA | Lc -30.1 | Non-text elements, placeholder text |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#AAC4D9
oklch(80.8% 0.041 242.5)
-
Step 400
400
#7DA6C6
oklch(70.7% 0.065 242.3)
-
Step 500
500
#5A90B7
oklch(63.1% 0.082 241.2)
-
Step 600
600 (this color)
#407BA5
oklch(56.1% 0.09 241.8)
-
Step 700
700
#30668C
oklch(49.1% 0.084 241.9)
-
Step 800
800
#295372
oklch(42.6% 0.07 242.8)
-
Step 900
900
#26455C
oklch(37.7% 0.054 242.2)
-
Step 950
950
#172936
oklch(27.2% 0.034 241)
#407BA5 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) | #687BA7 | 0.045 |
| Deuteranopia (no green cones) | #5B71A4 | 0.038 |
| Tritanopia (no blue cones) | #008589 | 0.068 |
| Achromatopsia (no color) | #767676 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #407BA5
#407BA5
oklch(56.1% 0.09 241.8)
- #9B683A
#9B683A
oklch(56.2% 0.09 61.4)
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 #407BA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.013
- Dull Blue #49759C ΔE 0.020
- Stormy Blue #507B9C ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.026
- Steel Blue #4682B4 ΔE 0.029
- Muted Blue #3B719F ΔE 0.030
- Nice Blue #107AB0 ΔE 0.032
- Cool Blue #4984B8 ΔE 0.037
Use #407BA5 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.