#5B88FB
Closest named color: Soft Blue (#6488EA). oklch(65.2% 0.178 265.6), rgb(91, 136, 251).
Aa
Black text reads best on this color (6.35:1).
About this color
#5B88FB is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.178 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.027 away. Black text reads best on it, at 6.35:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #5B88FB |
| RGB | rgb(91, 136, 251) |
| HSL | hsl(223, 95%, 67%) |
| OKLCH | oklch(65.2% 0.178 265.6) |
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 #5B88FB | 3.30:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #5B88FB | 6.35:1 | AA | Lc 44.0 | Non-text elements, placeholder text |
| #5B88FB text on white | 3.30:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #5B88FB text on black | 6.35:1 | AA | Lc -41.6 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A6C0FA
oklch(80.9% 0.087 265.8)
-
Step 400
400
#779DF7
oklch(70.7% 0.139 265.7)
-
Step 500
500 (this color)
#5B88FB
oklch(65.2% 0.178 265.6)
-
Step 600
600
#3C68E3
oklch(55.7% 0.193 265.6)
-
Step 700
700
#2F55C5
oklch(49.1% 0.18 265.7)
-
Step 800
800
#27469F
oklch(42.6% 0.149 265.8)
-
Step 900
900
#233C7E
oklch(37.6% 0.116 265.5)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#5B88FB 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) | #4F95FF | 0.033 |
| Deuteranopia (no green cones) | #3187F9 | 0.035 |
| Tritanopia (no blue cones) | #00A2B5 | 0.149 |
| Achromatopsia (no color) | #8D8D8D | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B88FB
#5B88FB
oklch(65.2% 0.178 265.6)
- #B48800
#B48800
oklch(65.1% 0.133 85.6)
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 #5B88FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.027
- Cornflower #6A79F7 ΔE 0.038
- Dodger Blue #1E90FF ΔE 0.042
- Chefchaouen Blue #4895EF ΔE 0.043
- Cornflower Blue #6495ED ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.045
- Lavender Blue #8B88F8 ΔE 0.059
- Clear Blue #247AFD ΔE 0.061
Use #5B88FB 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.