#659FCC
Closest named color: Greyblue (#77A1B5). oklch(68% 0.09 243), rgb(101, 159, 204).
Aa
Black text reads best on this color (7.38:1).
About this color
#659FCC is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.090 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.040 away. Black text reads best on it, at 7.38:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.38:1 |
| White text | 2.84:1 |
Values
| HEX | #659FCC |
| RGB | rgb(101, 159, 204) |
| HSL | hsl(206, 50%, 60%) |
| OKLCH | oklch(68% 0.09 243) |
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 #659FCC | 2.84:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #659FCC | 7.38:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #659FCC text on white | 2.84:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #659FCC text on black | 7.38:1 | AAA | Lc -47.4 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A2C6E3
oklch(81% 0.056 242.7)
-
Step 400
400 (this color)
#659FCC
oklch(68% 0.09 243)
-
Step 500
500
#4291C9
oklch(63.2% 0.114 242.5)
-
Step 600
600
#197AB6
oklch(55.6% 0.125 242.7)
-
Step 700
700
#06669D
oklch(49% 0.117 243.2)
-
Step 800
800
#0E547F
oklch(42.8% 0.096 242.5)
-
Step 900
900
#164566
oklch(37.6% 0.076 243.3)
-
Step 950
950
#0F293C
oklch(27.1% 0.048 243)
#659FCC 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) | #8C9FCE | 0.046 |
| Deuteranopia (no green cones) | #7E94CB | 0.039 |
| Tritanopia (no blue cones) | #2FAAAE | 0.075 |
| Achromatopsia (no color) | #999999 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659FCC
#659FCC
oklch(68% 0.09 243)
- #C08C5C
#C08C5C
oklch(68% 0.09 63.1)
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 #659FCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.040
- Faded Blue #658CBB ΔE 0.053
- Bluegrey #85A3B2 ΔE 0.055
- Bluey Grey #89A0B0 ΔE 0.057
- Cool Gray #8D99AE ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.062
- Cornflower Blue #6495ED ΔE 0.063
- Blue Grey #758DA3 ΔE 0.067
Use #659FCC 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.