#659DD3
Closest named color: Cornflower Blue (#6495ED). oklch(67.9% 0.1 248.6), rgb(101, 157, 211).
Aa
Black text reads best on this color (7.31:1).
About this color
#659DD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.100 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.049 away. Black text reads best on it, at 7.31:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.31:1 |
| White text | 2.87:1 |
Values
| HEX | #659DD3 |
| RGB | rgb(101, 157, 211) |
| HSL | hsl(209, 56%, 61%) |
| OKLCH | oklch(67.9% 0.1 248.6) |
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 #659DD3 | 2.87:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #659DD3 | 7.31:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #659DD3 text on white | 2.87:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #659DD3 text on black | 7.31:1 | AAA | Lc -47.0 | 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF0
oklch(88.6% 0.035 248.2)
-
Step 300
300
#A2C5E8
oklch(81% 0.062 248.6)
-
Step 400
400 (this color)
#659DD3
oklch(67.9% 0.1 248.6)
-
Step 500
500
#438ED3
oklch(63.1% 0.128 248.9)
-
Step 600
600
#1D77C0
oklch(55.6% 0.139 248.6)
-
Step 700
700
#0C64A6
oklch(49.2% 0.129 248.6)
-
Step 800
800
#115286
oklch(42.8% 0.106 248.3)
-
Step 900
900
#17446B
oklch(37.7% 0.083 248.3)
-
Step 950
950
#0F283F
oklch(27% 0.053 248.7)
#659DD3 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) | #879FD5 | 0.040 |
| Deuteranopia (no green cones) | #7894D2 | 0.030 |
| Tritanopia (no blue cones) | #28AAB0 | 0.086 |
| Achromatopsia (no color) | #989898 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659DD3
#659DD3
oklch(67.9% 0.1 248.6)
- #C08C50
#C08C50
oklch(67.8% 0.1 68.7)
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 #659DD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.049
- Faded Blue #658CBB ΔE 0.052
- Greyblue #77A1B5 ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.066
- Silver Lake Blue #778DA9 ΔE 0.067
- Cool Gray #8D99AE ΔE 0.067
Use #659DD3 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.