#659FD4
Closest named color: Greyblue (#77A1B5). oklch(68.4% 0.1 247.3), rgb(101, 159, 212).
Aa
Black text reads best on this color (7.46:1).
About this color
#659FD4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.100 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.051 away. Black text reads best on it, at 7.46:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.46:1 |
| White text | 2.81:1 |
Values
| HEX | #659FD4 |
| RGB | rgb(101, 159, 212) |
| HSL | hsl(209, 56%, 61%) |
| OKLCH | oklch(68.4% 0.1 247.3) |
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 #659FD4 | 2.81:1 | Fails | Lc -59.2 | Large or bold text, headings |
| Black text on #659FD4 | 7.46:1 | AAA | Lc 50.1 | Large or bold text, headings |
| #659FD4 text on white | 2.81:1 | Fails | Lc 54.0 | Large or bold text, headings |
| #659FD4 text on black | 7.46:1 | AAA | Lc -47.9 | 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
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A1C5E7
oklch(80.9% 0.062 247.1)
-
Step 400
400 (this color)
#659FD4
oklch(68.4% 0.1 247.3)
-
Step 500
500
#408FD2
oklch(63.1% 0.127 247.2)
-
Step 600
600
#1778BF
oklch(55.7% 0.138 247.1)
-
Step 700
700
#0464A5
oklch(49% 0.129 247.6)
-
Step 800
800
#0C5286
oklch(42.7% 0.107 247.5)
-
Step 900
900
#15446B
oklch(37.6% 0.084 247.6)
-
Step 950
950
#0E283F
oklch(26.9% 0.054 248)
#659FD4 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) | #89A0D6 | 0.042 |
| Deuteranopia (no green cones) | #7A95D3 | 0.033 |
| Tritanopia (no blue cones) | #26ABB1 | 0.084 |
| Achromatopsia (no color) | #9A9A9A | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659FD4
#659FD4
oklch(68.4% 0.1 247.3)
- #C38D53
#C38D53
oklch(68.4% 0.1 66.8)
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 #659FD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.052
- Faded Blue #658CBB ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.060
- Bluegrey #85A3B2 ΔE 0.064
- Bluey Grey #89A0B0 ΔE 0.066
- Cool Gray #8D99AE ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.067
Use #659FD4 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.