#659FDB
Closest named color: Cornflower Blue (#6495ED). oklch(68.7% 0.108 250.4), rgb(101, 159, 219).
Aa
Black text reads best on this color (7.53:1).
About this color
#659FDB is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.108 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.043 away. Black text reads best on it, at 7.53:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.53:1 |
| White text | 2.78:1 |
Values
| HEX | #659FDB |
| RGB | rgb(101, 159, 219) |
| HSL | hsl(211, 62%, 63%) |
| OKLCH | oklch(68.7% 0.108 250.4) |
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 #659FDB | 2.78:1 | Fails | Lc -58.8 | Large or bold text, headings |
| Black text on #659FDB | 7.53:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #659FDB text on white | 2.78:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #659FDB text on black | 7.53:1 | AAA | Lc -48.3 | 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
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#A0C5EB
oklch(81% 0.067 249.3)
-
Step 400
400 (this color)
#659FDB
oklch(68.7% 0.108 250.4)
-
Step 500
500
#3F8DD9
oklch(63% 0.138 250.5)
-
Step 600
600
#1676C7
oklch(55.7% 0.15 250.4)
-
Step 700
700
#0262AC
oklch(49% 0.14 250.7)
-
Step 800
800
#0B518B
oklch(42.8% 0.115 250.1)
-
Step 900
900
#15436F
oklch(37.6% 0.09 250.8)
-
Step 950
950
#0E2841
oklch(27.1% 0.057 249.9)
#659FDB 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) | #86A1DE | 0.039 |
| Deuteranopia (no green cones) | #7796DA | 0.029 |
| Tritanopia (no blue cones) | #1AADB4 | 0.094 |
| Achromatopsia (no color) | #9B9B9B | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659FDB
#659FDB
oklch(68.7% 0.108 250.4)
- #C58E4A
#C58E4A
oklch(68.7% 0.108 70.1)
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 #659FDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.053
- Greyblue #77A1B5 ΔE 0.061
- Faded Blue #658CBB ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.063
- Soft Blue #6488EA ΔE 0.071
- Bluegrey #85A3B2 ΔE 0.073
- Perrywinkle #8F8CE7 ΔE 0.073
Use #659FDB 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.