#5B9FE5
Closest named color: Cornflower Blue (#6495ED). oklch(68.8% 0.125 250.7), rgb(91, 159, 229).
Aa
Black text reads best on this color (7.53:1).
About this color
#5B9FE5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.125 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.032 away. Black text reads best on it, at 7.53:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.53:1 |
| White text | 2.78:1 |
Values
| HEX | #5B9FE5 |
| RGB | rgb(91, 159, 229) |
| HSL | hsl(210, 73%, 63%) |
| OKLCH | oklch(68.8% 0.125 250.7) |
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 #5B9FE5 | 2.78:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #5B9FE5 | 7.53:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #5B9FE5 text on white | 2.78:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #5B9FE5 text on black | 7.53:1 | AAA | Lc -48.4 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C5DCF6
oklch(88.6% 0.044 251.5)
-
Step 300
300
#9BC5F2
oklch(80.9% 0.078 250.5)
-
Step 400
400 (this color)
#5B9FE5
oklch(68.8% 0.125 250.7)
-
Step 500
500
#2C8DE5
oklch(63.2% 0.159 250.4)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#064376
oklch(37.7% 0.104 250.5)
-
Step 950
950
#082845
oklch(27.1% 0.065 249.8)
#5B9FE5 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) | #81A2E8 | 0.043 |
| Deuteranopia (no green cones) | #6F95E4 | 0.031 |
| Tritanopia (no blue cones) | #00AFB8 | 0.101 |
| Achromatopsia (no color) | #9B9B9B | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B9FE5
#5B9FE5
oklch(68.8% 0.125 250.7)
- #CB8C37
#CB8C37
oklch(68.8% 0.125 70.7)
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 #5B9FE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.054
- Soft Blue #6488EA ΔE 0.063
- Periwinkle Blue #8F99FB ΔE 0.071
- Faded Blue #658CBB ΔE 0.071
- Perrywinkle #8F8CE7 ΔE 0.074
- Dodger Blue #1E90FF ΔE 0.075
Use #5B9FE5 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.