#659DD9
Closest named color: Cornflower Blue (#6495ED). oklch(68.2% 0.107 251.2), rgb(101, 157, 217).
Aa
Black text reads best on this color (7.37:1).
About this color
#659DD9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.107 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.041 away. Black text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.37:1 |
| White text | 2.84:1 |
Values
| HEX | #659DD9 |
| RGB | rgb(101, 157, 217) |
| HSL | hsl(211, 60%, 62%) |
| OKLCH | oklch(68.2% 0.107 251.2) |
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 #659DD9 | 2.84:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #659DD9 | 7.37:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #659DD9 text on white | 2.84:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #659DD9 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A1C4EB
oklch(80.8% 0.067 251.4)
-
Step 400
400 (this color)
#659DD9
oklch(68.2% 0.107 251.2)
-
Step 500
500
#428DD9
oklch(63.1% 0.137 251.1)
-
Step 600
600
#1C75C6
oklch(55.5% 0.149 251.2)
-
Step 700
700
#0B62AC
oklch(49.1% 0.139 251.4)
-
Step 800
800
#10508B
oklch(42.6% 0.115 251.5)
-
Step 900
900
#17436F
oklch(37.7% 0.089 251.5)
-
Step 950
950
#0F2841
oklch(27.1% 0.056 250.6)
#659DD9 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) | #849FDC | 0.037 |
| Deuteranopia (no green cones) | #7694D8 | 0.028 |
| Tritanopia (no blue cones) | #1FABB2 | 0.093 |
| Achromatopsia (no color) | #999999 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659DD9
#659DD9
oklch(68.2% 0.107 251.2)
- #C28D49
#C28D49
oklch(68.2% 0.107 71.1)
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 #659DD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.051
- Faded Blue #658CBB ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.059
- Greyblue #77A1B5 ΔE 0.061
- Soft Blue #6488EA ΔE 0.067
- Perrywinkle #8F8CE7 ΔE 0.071
- Bluegrey #85A3B2 ΔE 0.073
Use #659DD9 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.