#659DDF
Closest named color: Cornflower Blue (#6495ED). oklch(68.5% 0.115 253.4), rgb(101, 157, 223).
Aa
Black text reads best on this color (7.44:1).
About this color
#659DDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.115 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.034 away. Black text reads best on it, at 7.44:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.44:1 |
| White text | 2.82:1 |
Values
| HEX | #659DDF |
| RGB | rgb(101, 157, 223) |
| HSL | hsl(212, 66%, 64%) |
| OKLCH | oklch(68.5% 0.115 253.4) |
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 #659DDF | 2.82:1 | Fails | Lc -59.3 | Large or bold text, headings |
| Black text on #659DDF | 7.44:1 | AAA | Lc 50.0 | Large or bold text, headings |
| #659DDF text on white | 2.82:1 | Fails | Lc 54.1 | Large or bold text, headings |
| #659DDF text on black | 7.44:1 | AAA | Lc -47.8 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#A1C4EF
oklch(81% 0.072 253.8)
-
Step 400
400 (this color)
#659DDF
oklch(68.5% 0.115 253.4)
-
Step 500
500
#418BDF
oklch(63% 0.147 253.6)
-
Step 600
600
#1B74CD
oklch(55.7% 0.159 253.2)
-
Step 700
700
#0A60B1
oklch(49% 0.148 253.5)
-
Step 800
800
#0F4F90
oklch(42.7% 0.123 253.6)
-
Step 900
900
#164273
oklch(37.7% 0.097 253.8)
-
Step 950
950
#0F2743
oklch(27% 0.06 253.9)
#659DDF 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) | #82A0E2 | 0.035 |
| Deuteranopia (no green cones) | #7294DE | 0.026 |
| Tritanopia (no blue cones) | #11ACB4 | 0.101 |
| Achromatopsia (no color) | #9A9A9A | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659DDF
#659DDF
oklch(68.5% 0.115 253.4)
- #C48E40
#C48E40
oklch(68.5% 0.115 73.6)
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 #659DDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.034
- Chefchaouen Blue #4895EF ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.056
- Soft Blue #6488EA ΔE 0.062
- Faded Blue #658CBB ΔE 0.063
- Perrywinkle #8F8CE7 ΔE 0.067
- Periwinkle Blue #8F99FB ΔE 0.068
- Greyblue #77A1B5 ΔE 0.069
Use #659DDF 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.