#8599FB
Closest named color: Periwinkle Blue (#8F99FB). oklch(71% 0.145 273.5), rgb(133, 153, 251).
Aa
Black text reads best on this color (7.94:1).
About this color
#8599FB is a medium-light, vivid blue. In OKLCH its lightness is 71%, its chroma 0.145 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.013 away. Black text reads best on it, at 7.94:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 7.94:1 |
| White text | 2.64:1 |
Values
| HEX | #8599FB |
| RGB | rgb(133, 153, 251) |
| HSL | hsl(230, 94%, 75%) |
| OKLCH | oklch(71% 0.145 273.5) |
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 #8599FB | 2.64:1 | Fails | Lc -56.5 | Large or bold text, headings |
| Black text on #8599FB | 7.94:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #8599FB text on white | 2.64:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #8599FB text on black | 7.94:1 | AAA | Lc -50.6 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#ADBDFC
oklch(80.9% 0.091 273.2)
-
Step 400
400 (this color)
#8599FB
oklch(71% 0.145 273.5)
-
Step 500
500
#687BF7
oklch(63.1% 0.185 273.4)
-
Step 600
600
#5260E6
oklch(55.6% 0.201 273.4)
-
Step 700
700
#434EC8
oklch(49% 0.187 273.3)
-
Step 800
800
#3741A2
oklch(42.7% 0.155 273.4)
-
Step 900
900
#2F3880
oklch(37.6% 0.121 273.7)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#8599FB 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) | #74A4FF | 0.031 |
| Deuteranopia (no green cones) | #699BF9 | 0.032 |
| Tritanopia (no blue cones) | #58ADBE | 0.128 |
| Achromatopsia (no color) | #9F9F9F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8599FB
#8599FB
oklch(71% 0.145 273.5)
- #C09E04
#C09E04
oklch(70.9% 0.145 93.3)
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 #8599FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.013
- Perrywinkle #8F8CE7 ΔE 0.040
- Lavender Blue #8B88F8 ΔE 0.042
- Cornflower Blue #6495ED ΔE 0.046
- Periwinkle #8E82FE ΔE 0.058
- Soft Blue #6488EA ΔE 0.066
- Chefchaouen Blue #4895EF ΔE 0.069
- Carolina Blue #8AB8FE ΔE 0.082
Use #8599FB 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.