#659FC5
Closest named color: Greyblue (#77A1B5). oklch(67.7% 0.083 238.4), rgb(101, 159, 197).
Aa
Black text reads best on this color (7.31:1).
About this color
#659FC5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.083 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.032 away. Black text reads best on it, at 7.31:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.31:1 |
| White text | 2.86:1 |
Values
| HEX | #659FC5 |
| RGB | rgb(101, 159, 197) |
| HSL | hsl(204, 45%, 58%) |
| OKLCH | oklch(67.7% 0.083 238.4) |
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 #659FC5 | 2.86:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #659FC5 | 7.31:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #659FC5 text on white | 2.86:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #659FC5 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEA
oklch(88.4% 0.029 238.3)
-
Step 300
300
#A2C6DF
oklch(80.9% 0.052 238.6)
-
Step 400
400 (this color)
#659FC5
oklch(67.7% 0.083 238.4)
-
Step 500
500
#4392C2
oklch(63.1% 0.106 238.3)
-
Step 600
600
#1B7BAF
oklch(55.5% 0.116 239)
-
Step 700
700
#086896
oklch(49.2% 0.107 238.2)
-
Step 800
800
#0F557A
oklch(42.8% 0.089 238.4)
-
Step 900
900
#174662
oklch(37.6% 0.069 238.8)
-
Step 950
950
#0F2939
oklch(26.9% 0.044 238.4)
#659FC5 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) | #8E9EC7 | 0.048 |
| Deuteranopia (no green cones) | #8194C4 | 0.041 |
| Tritanopia (no blue cones) | #36A9AC | 0.066 |
| Achromatopsia (no color) | #989898 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659FC5
#659FC5
oklch(67.7% 0.083 238.4)
- #BE8B63
#BE8B63
oklch(67.7% 0.083 58.9)
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 #659FC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.032
- Bluegrey #85A3B2 ΔE 0.048
- Bluey Grey #89A0B0 ΔE 0.050
- Faded Blue #658CBB ΔE 0.052
- Cool Gray #8D99AE ΔE 0.053
- Silver Lake Blue #778DA9 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.057
- Blue Grey #758DA3 ΔE 0.060
Use #659FC5 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.