#659BEF
Closest named color: Cornflower Blue (#6495ED). oklch(68.9% 0.137 258.9), rgb(101, 155, 239).
Aa
Black text reads best on this color (7.48:1).
About this color
#659BEF is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.137 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.016 away. Black text reads best on it, at 7.48:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.48:1 |
| White text | 2.80:1 |
Values
| HEX | #659BEF |
| RGB | rgb(101, 155, 239) |
| HSL | hsl(217, 81%, 67%) |
| OKLCH | oklch(68.9% 0.137 258.9) |
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 #659BEF | 2.80:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #659BEF | 7.48:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #659BEF text on white | 2.80:1 | Fails | Lc 53.8 | Large or bold text, headings |
| #659BEF text on black | 7.48:1 | AAA | Lc -48.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DBF9
oklch(88.6% 0.047 258.4)
-
Step 300
300
#9FC2F8
oklch(80.8% 0.086 258.9)
-
Step 400
400 (this color)
#659BEF
oklch(68.9% 0.137 258.9)
-
Step 500
500
#4186F1
oklch(63% 0.175 259)
-
Step 600
600
#1E6DE0
oklch(55.6% 0.191 258.9)
-
Step 700
700
#105AC2
oklch(49% 0.177 258.9)
-
Step 800
800
#124A9D
oklch(42.6% 0.147 259.1)
-
Step 900
900
#173F7D
oklch(37.7% 0.115 259.2)
-
Step 950
950
#0E2549
oklch(26.8% 0.073 259.1)
#659BEF 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) | #78A1F2 | 0.028 |
| Deuteranopia (no green cones) | #6694ED | 0.018 |
| Tritanopia (no blue cones) | #00AEBA | 0.119 |
| Achromatopsia (no color) | #9A9A9A | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659BEF
#659BEF
oklch(68.9% 0.137 258.9)
- #C88F19
#C88F19
oklch(68.8% 0.137 78.8)
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 #659BEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.016
- Chefchaouen Blue #4895EF ΔE 0.033
- Soft Blue #6488EA ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.051
- Periwinkle Blue #8F99FB ΔE 0.054
- Perrywinkle #8F8CE7 ΔE 0.059
- Lavender Blue #8B88F8 ΔE 0.066
- Dodger Blue #1E90FF ΔE 0.066
Use #659BEF 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.