#8599BB
Closest named color: Cool Gray (#8D99AE). oklch(68% 0.055 261), rgb(133, 153, 187).
Aa
Black text reads best on this color (7.27:1).
About this color
#8599BB is a medium-light, muted blue. In OKLCH its lightness is 68%, its chroma 0.055 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.021 away. Black text reads best on it, at 7.27:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.27:1 |
| White text | 2.88:1 |
Values
| HEX | #8599BB |
| RGB | rgb(133, 153, 187) |
| HSL | hsl(218, 28%, 63%) |
| OKLCH | oklch(68% 0.055 261) |
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 #8599BB | 2.88:1 | Fails | Lc -60.5 | Content text, not long reading |
| Black text on #8599BB | 7.27:1 | AAA | Lc 48.9 | Large or bold text, headings |
| #8599BB text on white | 2.88:1 | Fails | Lc 55.1 | Large or bold text, headings |
| #8599BB text on black | 7.27:1 | AAA | Lc -46.7 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2DAE6
oklch(88.6% 0.019 258.4)
-
Step 300
300
#B4C1D8
oklch(80.8% 0.036 261.9)
-
Step 400
400 (this color)
#8599BB
oklch(68% 0.055 261)
-
Step 500
500
#718AB5
oklch(63.1% 0.071 261.1)
-
Step 600
600
#5A74A1
oklch(55.7% 0.077 261.1)
-
Step 700
700
#49618A
oklch(49.1% 0.072 260.8)
-
Step 800
800
#3C4F70
oklch(42.6% 0.06 261.1)
-
Step 900
900
#34425A
oklch(37.7% 0.045 261)
-
Step 950
950
#1E2735
oklch(27.1% 0.029 259.1)
#8599BB 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) | #8E9BBD | 0.014 |
| Deuteranopia (no green cones) | #8896BA | 0.008 |
| Tritanopia (no blue cones) | #76A0A4 | 0.050 |
| Achromatopsia (no color) | #989898 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8599BB
#8599BB
oklch(68% 0.055 261)
- #AA9571
#AA9571
oklch(67.9% 0.056 80.9)
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 #8599BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.021
- Bluey Grey #89A0B0 ΔE 0.030
- Greyblue #77A1B5 ΔE 0.031
- Bluegrey #85A3B2 ΔE 0.035
- Silver Lake Blue #778DA9 ΔE 0.044
- Blue Grey #758DA3 ΔE 0.050
- Cool Steel #97A7B3 ΔE 0.052
- Cool Grey #95A3A6 ΔE 0.053
Use #8599BB 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.