#5B7DCF
Closest named color: Windows Blue (#3778BF). oklch(60.2% 0.131 265.6), rgb(91, 125, 207).
Aa
Black text reads best on this color (5.27:1).
About this color
#5B7DCF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.131 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.047 away. Black text reads best on it, at 5.27:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.27:1 |
| White text | 3.97:1 |
Values
| HEX | #5B7DCF |
| RGB | rgb(91, 125, 207) |
| HSL | hsl(222, 55%, 58%) |
| OKLCH | oklch(60.2% 0.131 265.6) |
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 #5B7DCF | 3.97:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #5B7DCF | 5.27:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #5B7DCF text on white | 3.97:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #5B7DCF text on black | 5.27:1 | AA | Lc -34.7 | 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 500.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#ADC0EB
oklch(80.8% 0.065 266.3)
-
Step 400
400
#829FE1
oklch(70.7% 0.103 265.7)
-
Step 500
500 (this color)
#5B7DCF
oklch(60.2% 0.131 265.6)
-
Step 600
600
#4B6EC6
oklch(55.6% 0.142 265.7)
-
Step 700
700
#3C5BAB
oklch(49% 0.133 265.8)
-
Step 800
800
#324B8B
oklch(42.7% 0.11 265.9)
-
Step 900
900
#2C3F6F
oklch(37.7% 0.086 266.1)
-
Step 950
950
#1A2541
oklch(27% 0.055 266.6)
#5B7DCF 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) | #5B85D2 | 0.021 |
| Deuteranopia (no green cones) | #4C7BCD | 0.018 |
| Tritanopia (no blue cones) | #0D8F9C | 0.118 |
| Achromatopsia (no color) | #7F7F7F | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B7DCF
#5B7DCF
oklch(60.2% 0.131 265.6)
- #A27A00
#A27A00
oklch(60.2% 0.123 85.5)
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 #5B7DCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.047
- Cool Blue #4984B8 ΔE 0.048
- Soft Blue #6488EA ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.053
- Water Blue #0E87CC ΔE 0.055
- Faded Blue #658CBB ΔE 0.059
- Off Blue #5684AE ΔE 0.060
Use #5B7DCF 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.