#5B88D4
Closest named color: Dark Sky Blue (#448EE4). oklch(62.9% 0.125 260.4), rgb(91, 136, 212).
Aa
Black text reads best on this color (5.91:1).
About this color
#5B88D4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.125 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.030 away. Black text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.91:1 |
| White text | 3.54:1 |
Values
| HEX | #5B88D4 |
| RGB | rgb(91, 136, 212) |
| HSL | hsl(218, 58%, 59%) |
| OKLCH | oklch(62.9% 0.125 260.4) |
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 #5B88D4 | 3.54:1 | AA large text | Lc -68.4 | Content text, not long reading |
| Black text on #5B88D4 | 5.91:1 | AA | Lc 41.2 | Non-text elements, placeholder text |
| #5B88D4 text on white | 3.54:1 | AA large text | Lc 62.9 | Content text, not long reading |
| #5B88D4 text on black | 5.91:1 | AA | Lc -38.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#AAC2E9
oklch(80.9% 0.061 260.1)
-
Step 400
400
#7DA1DE
oklch(70.6% 0.098 260.7)
-
Step 500
500 (this color)
#5B88D4
oklch(62.9% 0.125 260.4)
-
Step 600
600
#4271C2
oklch(55.6% 0.136 260.5)
-
Step 700
700
#345EA8
oklch(49% 0.128 260.8)
-
Step 800
800
#2B4D88
oklch(42.6% 0.106 260.6)
-
Step 900
900
#27416D
oklch(37.8% 0.082 260.3)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#5B88D4 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) | #698ED7 | 0.024 |
| Deuteranopia (no green cones) | #5983D2 | 0.014 |
| Tritanopia (no blue cones) | #0099A4 | 0.111 |
| Achromatopsia (no color) | #888888 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B88D4
#5B88D4
oklch(62.9% 0.125 260.4)
- #B07F12
#B07F12
oklch(62.9% 0.126 80.3)
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 #5B88D4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.030
- Soft Blue #6488EA ΔE 0.036
- Faded Blue #658CBB ΔE 0.044
- Chefchaouen Blue #4895EF ΔE 0.048
- Cool Blue #4984B8 ΔE 0.048
- Cornflower Blue #6495ED ΔE 0.049
- Water Blue #0E87CC ΔE 0.053
- Steel Blue #4682B4 ΔE 0.056
Use #5B88D4 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.