#5B7ACE
Closest named color: Windows Blue (#3778BF). oklch(59.5% 0.133 267.1), rgb(91, 122, 206).
Aa
Black text reads best on this color (5.11:1).
About this color
#5B7ACE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.133 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.045 away. Black text reads best on it, at 5.11:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.11:1 |
| White text | 4.10:1 |
Values
| HEX | #5B7ACE |
| RGB | rgb(91, 122, 206) |
| HSL | hsl(224, 54%, 58%) |
| OKLCH | oklch(59.5% 0.133 267.1) |
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 #5B7ACE | 4.10:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #5B7ACE | 5.11:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #5B7ACE text on white | 4.10:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #5B7ACE text on black | 5.11:1 | AA | Lc -33.7 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#AEC0EC
oklch(80.9% 0.066 267.5)
-
Step 400
400
#839EE2
oklch(70.6% 0.105 267.1)
-
Step 500
500 (this color)
#5B7ACE
oklch(59.5% 0.133 267.1)
-
Step 600
600
#4D6DC7
oklch(55.6% 0.144 267)
-
Step 700
700
#3E5BAC
oklch(49.2% 0.134 266.7)
-
Step 800
800
#334A8C
oklch(42.6% 0.113 267.1)
-
Step 900
900
#2D3F70
oklch(37.8% 0.087 267)
-
Step 950
950
#1A2541
oklch(27% 0.055 266.6)
#5B7ACE 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) | #5783D1 | 0.024 |
| Deuteranopia (no green cones) | #4878CC | 0.022 |
| Tritanopia (no blue cones) | #128C9A | 0.119 |
| Achromatopsia (no color) | #7D7D7D | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B7ACE
#5B7ACE
oklch(59.5% 0.133 267.1)
- #9E7900
#9E7900
oklch(59.6% 0.122 87.1)
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 #5B7ACE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.045
- Cool Blue #4984B8 ΔE 0.052
- Soft Blue #6488EA ΔE 0.054
- Steel Blue #4682B4 ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.058
- Water Blue #0E87CC ΔE 0.058
- Off Blue #5684AE ΔE 0.063
- Royal Blue #4169E1 ΔE 0.065
Use #5B7ACE 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.