#659DDB
Closest named color: Cornflower Blue (#6495ED). oklch(68.3% 0.11 252), rgb(101, 157, 219).
Aa
Black text reads best on this color (7.39:1).
About this color
#659DDB is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.110 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.039 away. Black text reads best on it, at 7.39:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.39:1 |
| White text | 2.83:1 |
Values
| HEX | #659DDB |
| RGB | rgb(101, 157, 219) |
| HSL | hsl(212, 62%, 63%) |
| OKLCH | oklch(68.3% 0.11 252) |
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 #659DDB | 2.83:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #659DDB | 7.39:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #659DDB text on white | 2.83:1 | Fails | Lc 54.3 | Large or bold text, headings |
| #659DDB text on black | 7.39:1 | AAA | Lc -47.5 | 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 400.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
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
#A1C4EC
oklch(80.9% 0.068 252)
-
Step 400
400 (this color)
#659DDB
oklch(68.3% 0.11 252)
-
Step 500
500
#428CDB
oklch(63% 0.14 252.3)
-
Step 600
600
#1C75C9
oklch(55.7% 0.152 252)
-
Step 700
700
#0B62AD
oklch(49.2% 0.14 251.7)
-
Step 800
800
#10508C
oklch(42.7% 0.117 251.9)
-
Step 900
900
#174370
oklch(37.7% 0.091 252)
-
Step 950
950
#0F2742
oklch(26.9% 0.059 253.1)
#659DDB 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) | #84A0DE | 0.038 |
| Deuteranopia (no green cones) | #7594DA | 0.028 |
| Tritanopia (no blue cones) | #1BABB3 | 0.095 |
| Achromatopsia (no color) | #999999 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659DDB
#659DDB
oklch(68.3% 0.11 252)
- #C38D46
#C38D46
oklch(68.2% 0.11 71.6)
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 #659DDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.039
- Chefchaouen Blue #4895EF ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.058
- Faded Blue #658CBB ΔE 0.059
- Greyblue #77A1B5 ΔE 0.063
- Soft Blue #6488EA ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.070
- Periwinkle Blue #8F99FB ΔE 0.073
Use #659DDB 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.