#659FDC
Closest named color: Cornflower Blue (#6495ED). oklch(68.8% 0.109 250.8), rgb(101, 159, 220).
Aa
Black text reads best on this color (7.54:1).
About this color
#659FDC is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.109 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.042 away. Black text reads best on it, at 7.54:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.54:1 |
| White text | 2.78:1 |
Values
| HEX | #659FDC |
| RGB | rgb(101, 159, 220) |
| HSL | hsl(211, 63%, 63%) |
| OKLCH | oklch(68.8% 0.109 250.8) |
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 #659FDC | 2.78:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #659FDC | 7.54:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #659FDC text on white | 2.78:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #659FDC text on black | 7.54:1 | AAA | Lc -48.4 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#A0C4EC
oklch(80.8% 0.069 251.4)
-
Step 400
400 (this color)
#659FDC
oklch(68.8% 0.109 250.8)
-
Step 500
500
#3F8DDA
oklch(63.1% 0.139 250.8)
-
Step 600
600
#1675C8
oklch(55.5% 0.152 251.1)
-
Step 700
700
#0262AD
oklch(49.1% 0.142 251)
-
Step 800
800
#0B508C
oklch(42.6% 0.118 251.1)
-
Step 900
900
#154370
oklch(37.7% 0.092 251.3)
-
Step 950
950
#0E2841
oklch(27.1% 0.057 249.9)
#659FDC 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) | #86A1DF | 0.039 |
| Deuteranopia (no green cones) | #7796DB | 0.029 |
| Tritanopia (no blue cones) | #17ADB4 | 0.095 |
| Achromatopsia (no color) | #9B9B9B | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659FDC
#659FDC
oklch(68.8% 0.109 250.8)
- #C58E49
#C58E49
oklch(68.7% 0.109 70.4)
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 #659FDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.042
- Chefchaouen Blue #4895EF ΔE 0.052
- Greyblue #77A1B5 ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.062
- Faded Blue #658CBB ΔE 0.063
- Soft Blue #6488EA ΔE 0.070
- Perrywinkle #8F8CE7 ΔE 0.072
- Periwinkle Blue #8F99FB ΔE 0.073
Use #659FDC 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.