#407DBD
Closest named color: Windows Blue (#3778BF). oklch(57.9% 0.118 251.5), rgb(64, 125, 189).
Aa
Black text reads best on this color (4.88:1).
About this color
#407DBD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.118 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.018 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #407DBD |
| RGB | rgb(64, 125, 189) |
| HSL | hsl(211, 49%, 50%) |
| OKLCH | oklch(57.9% 0.118 251.5) |
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 #407DBD | 4.29:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #407DBD | 4.88:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #407DBD text on white | 4.29:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #407DBD text on black | 4.88:1 | AA | Lc -32.2 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A8C4E2
oklch(81% 0.052 250.3)
-
Step 400
400
#79A4D4
oklch(70.6% 0.085 251.8)
-
Step 500
500
#568DC9
oklch(63.1% 0.108 251.8)
-
Step 600
600 (this color)
#407DBD
oklch(57.9% 0.118 251.5)
-
Step 700
700
#2B639C
oklch(49.1% 0.109 251.4)
-
Step 800
800
#25517F
oklch(42.7% 0.091 251.6)
-
Step 900
900
#234366
oklch(37.6% 0.071 252.1)
-
Step 950
950
#15283C
oklch(27.1% 0.045 250.9)
#407DBD 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) | #6180C0 | 0.037 |
| Deuteranopia (no green cones) | #5075BC | 0.025 |
| Tritanopia (no blue cones) | #008C94 | 0.093 |
| Achromatopsia (no color) | #7A7A7A | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #407DBD
#407DBD
oklch(57.9% 0.118 251.5)
- #A46C15
#A46C15
oklch(57.7% 0.117 71.4)
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 #407DBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.018
- Steel Blue #4682B4 ΔE 0.023
- Cool Blue #4984B8 ΔE 0.025
- Water Blue #0E87CC ΔE 0.036
- Nice Blue #107AB0 ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.040
- Off Blue #5684AE ΔE 0.041
- Dusty Blue #5A86AD ΔE 0.049
Use #407DBD 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.