#659BC5
Closest named color: Greyblue (#77A1B5). oklch(66.8% 0.085 242.9), rgb(101, 155, 197).
Aa
Black text reads best on this color (7.04:1).
About this color
#659BC5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.085 and its hue 243°. 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 7.04:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.04:1 |
| White text | 2.97:1 |
Values
| HEX | #659BC5 |
| RGB | rgb(101, 155, 197) |
| HSL | hsl(206, 45%, 58%) |
| OKLCH | oklch(66.8% 0.085 242.9) |
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 #659BC5 | 2.97:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #659BC5 | 7.04:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #659BC5 text on white | 2.97:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #659BC5 text on black | 7.04:1 | AAA | Lc -45.5 | 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 500.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#AAC4DA
oklch(80.8% 0.042 243.8)
-
Step 400
400
#7CA6C7
oklch(70.7% 0.067 242.5)
-
Step 500
500 (this color)
#659BC5
oklch(66.8% 0.085 242.9)
-
Step 600
600
#3E79A5
oklch(55.6% 0.092 243.1)
-
Step 700
700
#30668D
oklch(49.1% 0.085 242.6)
-
Step 800
800
#285373
oklch(42.7% 0.072 243.1)
-
Step 900
900
#26455D
oklch(37.8% 0.055 243.4)
-
Step 950
950
#172836
oklch(26.9% 0.035 244.4)
#659BC5 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) | #899BC7 | 0.043 |
| Deuteranopia (no green cones) | #7C91C4 | 0.036 |
| Tritanopia (no blue cones) | #37A5A9 | 0.070 |
| Achromatopsia (no color) | #959595 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659BC5
#659BC5
oklch(66.8% 0.085 242.9)
- #BA895D
#BA895D
oklch(66.8% 0.085 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 #659BC5, 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 0.041
- Silver Lake Blue #778DA9 ΔE 0.050
- Blue Grey #758DA3 ΔE 0.055
- Cool Gray #8D99AE ΔE 0.055
- Bluegrey #85A3B2 ΔE 0.056
- Bluey Grey #89A0B0 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.061
Use #659BC5 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.