#659EC0
Closest named color: Greyblue (#77A1B5). oklch(67.3% 0.078 235.8), rgb(101, 158, 192).
Aa
Black text reads best on this color (7.20:1).
About this color
#659EC0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.078 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.028 away. Black text reads best on it, at 7.20:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.20:1 |
| White text | 2.91:1 |
Values
| HEX | #659EC0 |
| RGB | rgb(101, 158, 192) |
| HSL | hsl(202, 42%, 57%) |
| OKLCH | oklch(67.3% 0.078 235.8) |
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 #659EC0 | 2.91:1 | Fails | Lc -60.7 | Content text, not long reading |
| Black text on #659EC0 | 7.20:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #659EC0 text on white | 2.91:1 | Fails | Lc 55.4 | Large or bold text, headings |
| #659EC0 text on black | 7.20:1 | AAA | Lc -46.4 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A3C6DC
oklch(80.8% 0.049 235.8)
-
Step 400
400 (this color)
#659EC0
oklch(67.3% 0.078 235.8)
-
Step 500
500
#4593BE
oklch(63.2% 0.1 235.6)
-
Step 600
600
#1F7CAA
oklch(55.6% 0.109 236)
-
Step 700
700
#0E6892
oklch(49% 0.101 236.3)
-
Step 800
800
#125576
oklch(42.6% 0.083 235.9)
-
Step 900
900
#18475F
oklch(37.8% 0.065 234.6)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#659EC0 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) | #8E9DC2 | 0.049 |
| Deuteranopia (no green cones) | #8293BF | 0.042 |
| Tritanopia (no blue cones) | #3AA7A9 | 0.061 |
| Achromatopsia (no color) | #979797 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659EC0
#659EC0
oklch(67.3% 0.078 235.8)
- #BC8A67
#BC8A67
oklch(67.4% 0.078 56)
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 #659EC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.028
- Bluegrey #85A3B2 ΔE 0.046
- Bluey Grey #89A0B0 ΔE 0.048
- Faded Blue #658CBB ΔE 0.050
- Cadet Blue #5F9EA0 ΔE 0.050
- Cool Gray #8D99AE ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.051
- Blue Grey #758DA3 ΔE 0.055
Use #659EC0 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.