#859BB0
Closest named color: Cool Gray (#8D99AE). oklch(68% 0.04 247.2), rgb(133, 155, 176).
Aa
Black text reads best on this color (7.31:1).
About this color
#859BB0 is a medium-light, muted blue. In OKLCH its lightness is 68%, its chroma 0.040 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.011 away. Black text reads best on it, at 7.31:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.31:1 |
| White text | 2.87:1 |
Values
| HEX | #859BB0 |
| RGB | rgb(133, 155, 176) |
| HSL | hsl(209, 21%, 61%) |
| OKLCH | oklch(68% 0.04 247.2) |
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 #859BB0 | 2.87:1 | Fails | Lc -60.2 | Content text, not long reading |
| Black text on #859BB0 | 7.31:1 | AAA | Lc 49.1 | Large or bold text, headings |
| #859BB0 text on white | 2.87:1 | Fails | Lc 54.9 | Large or bold text, headings |
| #859BB0 text on black | 7.31:1 | AAA | Lc -46.9 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C3D0
oklch(81% 0.025 244.2)
-
Step 400
400 (this color)
#859BB0
oklch(68% 0.04 247.2)
-
Step 500
500
#718DA7
oklch(63.1% 0.051 246.7)
-
Step 600
600
#597792
oklch(55.7% 0.055 246.1)
-
Step 700
700
#49647D
oklch(49.2% 0.051 247)
-
Step 800
800
#3C5165
oklch(42.6% 0.042 247.6)
-
Step 900
900
#334353
oklch(37.6% 0.034 248.8)
-
Step 950
950
#1E2830
oklch(27.1% 0.02 242.7)
#859BB0 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) | #939BB1 | 0.019 |
| Deuteranopia (no green cones) | #8E96B0 | 0.017 |
| Tritanopia (no blue cones) | #79A0A2 | 0.033 |
| Achromatopsia (no color) | #989898 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #859BB0
#859BB0
oklch(68% 0.04 247.2)
- #A9947E
#A9947E
oklch(67.9% 0.04 68.4)
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 #859BB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.011
- Bluey Grey #89A0B0 ΔE 0.016
- Greyblue #77A1B5 ΔE 0.021
- Bluegrey #85A3B2 ΔE 0.022
- Cool Grey #95A3A6 ΔE 0.038
- Cool Steel #97A7B3 ΔE 0.043
- Silver Lake Blue #778DA9 ΔE 0.045
- Blue Grey #758DA3 ΔE 0.047
Use #859BB0 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.