#659FCB
Closest named color: Greyblue (#77A1B5). oklch(68% 0.089 242.4), rgb(101, 159, 203).
Aa
Black text reads best on this color (7.37:1).
About this color
#659FCB is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.089 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.039 away. Black text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.37:1 |
| White text | 2.84:1 |
Values
| HEX | #659FCB |
| RGB | rgb(101, 159, 203) |
| HSL | hsl(206, 50%, 60%) |
| OKLCH | oklch(68% 0.089 242.4) |
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 #659FCB | 2.84:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #659FCB | 7.37:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #659FCB text on white | 2.84:1 | Fails | Lc 54.5 | Large or bold text, headings |
| #659FCB text on black | 7.37:1 | AAA | Lc -47.4 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A2C6E2
oklch(81% 0.055 241.8)
-
Step 400
400 (this color)
#659FCB
oklch(68% 0.089 242.4)
-
Step 500
500
#4291C8
oklch(63.1% 0.113 242)
-
Step 600
600
#197AB5
oklch(55.6% 0.124 242.3)
-
Step 700
700
#06669C
oklch(49% 0.116 242.7)
-
Step 800
800
#0E547E
oklch(42.7% 0.095 241.9)
-
Step 900
900
#164666
oklch(37.8% 0.075 242)
-
Step 950
950
#0F293B
oklch(27% 0.046 241.6)
#659FCB 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) | #8C9FCD | 0.046 |
| Deuteranopia (no green cones) | #7E94CA | 0.039 |
| Tritanopia (no blue cones) | #30AAAE | 0.074 |
| Achromatopsia (no color) | #999999 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659FCB
#659FCB
oklch(68% 0.089 242.4)
- #C08C5D
#C08C5D
oklch(68% 0.089 62.5)
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 #659FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.039
- Faded Blue #658CBB ΔE 0.053
- Bluegrey #85A3B2 ΔE 0.054
- Bluey Grey #89A0B0 ΔE 0.056
- Cool Gray #8D99AE ΔE 0.058
- Silver Lake Blue #778DA9 ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.064
- Cadet Blue #5F9EA0 ΔE 0.066
Use #659FCB 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.