#5877B8
Closest named color: Windows Blue (#3778BF). oklch(57.5% 0.107 264), rgb(88, 119, 184).
Aa
Black text reads best on this color (4.74:1).
About this color
#5877B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.107 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.033 away. Black text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #5877B8 |
| RGB | rgb(88, 119, 184) |
| HSL | hsl(221, 40%, 53%) |
| OKLCH | oklch(57.5% 0.107 264) |
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 #5877B8 | 4.42:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #5877B8 | 4.74:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #5877B8 text on white | 4.42:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #5877B8 text on black | 4.74:1 | AA | Lc -31.1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9EB
oklch(88.4% 0.027 264.4)
-
Step 300
300
#B1C1E1
oklch(80.9% 0.049 264.3)
-
Step 400
400
#88A1D1
oklch(70.8% 0.076 263.2)
-
Step 500
500
#6B88C5
oklch(63% 0.098 264.3)
-
Step 600
600 (this color)
#5877B8
oklch(57.5% 0.107 264)
-
Step 700
700
#435F99
oklch(49.1% 0.099 263.6)
-
Step 800
800
#384E7C
oklch(42.8% 0.082 263.9)
-
Step 900
900
#304164
oklch(37.8% 0.064 263.8)
-
Step 950
950
#1C263A
oklch(26.9% 0.04 263.6)
#5877B8 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) | #5E7DBB | 0.019 |
| Deuteranopia (no green cones) | #5274B7 | 0.012 |
| Tritanopia (no blue cones) | #2A858F | 0.095 |
| Achromatopsia (no color) | #787878 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5877B8
#5877B8
oklch(57.5% 0.107 264)
- #96721E
#96721E
oklch(57.3% 0.107 83.8)
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 #5877B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.033
- Steel Blue #4682B4 ΔE 0.036
- Cool Blue #4984B8 ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.042
- Off Blue #5684AE ΔE 0.044
- French Blue #436BAD ΔE 0.046
- Dull Blue #49759C ΔE 0.048
- Stormy Blue #507B9C ΔE 0.050
Use #5877B8 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.