#659BDF
Closest named color: Cornflower Blue (#6495ED). oklch(68.1% 0.116 254.8), rgb(101, 155, 223).
Aa
Black text reads best on this color (7.30:1).
About this color
#659BDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.116 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.029 away. Black text reads best on it, at 7.30:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.30:1 |
| White text | 2.87:1 |
Values
| HEX | #659BDF |
| RGB | rgb(101, 155, 223) |
| HSL | hsl(213, 66%, 64%) |
| OKLCH | oklch(68.1% 0.116 254.8) |
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 #659BDF | 2.87:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #659BDF | 7.30:1 | AAA | Lc 49.2 | Large or bold text, headings |
| #659BDF text on white | 2.87:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #659BDF text on black | 7.30:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A1C3F0
oklch(80.8% 0.074 255.6)
-
Step 400
400 (this color)
#659BDF
oklch(68.1% 0.116 254.8)
-
Step 500
500
#448BE1
oklch(63.2% 0.148 254.7)
-
Step 600
600
#2073CF
oklch(55.7% 0.162 254.6)
-
Step 700
700
#115FB3
oklch(49% 0.151 255)
-
Step 800
800
#134E91
oklch(42.6% 0.125 255)
-
Step 900
900
#184274
oklch(37.8% 0.097 254.8)
-
Step 950
950
#0F2744
oklch(27% 0.062 254.6)
#659BDF 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) | #7F9FE2 | 0.033 |
| Deuteranopia (no green cones) | #7093DE | 0.023 |
| Tritanopia (no blue cones) | #13AAB3 | 0.102 |
| Achromatopsia (no color) | #989898 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659BDF
#659BDF
oklch(68.1% 0.116 254.8)
- #C28D3C
#C28D3C
oklch(68% 0.116 74.9)
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 #659BDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.029
- Chefchaouen Blue #4895EF ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.052
- Soft Blue #6488EA ΔE 0.057
- Faded Blue #658CBB ΔE 0.060
- Perrywinkle #8F8CE7 ΔE 0.064
- Periwinkle Blue #8F99FB ΔE 0.068
- Greyblue #77A1B5 ΔE 0.072
Use #659BDF 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.