#659CC2
Closest named color: Greyblue (#77A1B5). oklch(66.9% 0.081 239.8), rgb(101, 156, 194).
Aa
Black text reads best on this color (7.08:1).
About this color
#659CC2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.081 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.034 away. Black text reads best on it, at 7.08:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.08:1 |
| White text | 2.96:1 |
Values
| HEX | #659CC2 |
| RGB | rgb(101, 156, 194) |
| HSL | hsl(205, 43%, 58%) |
| OKLCH | oklch(66.9% 0.081 239.8) |
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 #659CC2 | 2.96:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #659CC2 | 7.08:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #659CC2 text on white | 2.96:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #659CC2 text on black | 7.08:1 | AAA | Lc -45.7 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A4C6DE
oklch(81% 0.05 239)
-
Step 400
400 (this color)
#659CC2
oklch(66.9% 0.081 239.8)
-
Step 500
500
#4791C2
oklch(63% 0.104 240.3)
-
Step 600
600
#237BAE
oklch(55.6% 0.112 239.6)
-
Step 700
700
#136796
oklch(49.1% 0.106 240.2)
-
Step 800
800
#155479
oklch(42.6% 0.087 240)
-
Step 900
900
#1A4662
oklch(37.8% 0.068 240)
-
Step 950
950
#112939
oklch(27% 0.042 240.1)
#659CC2 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) | #8B9BC4 | 0.045 |
| Deuteranopia (no green cones) | #7F92C1 | 0.038 |
| Tritanopia (no blue cones) | #39A6A9 | 0.065 |
| Achromatopsia (no color) | #969696 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659CC2
#659CC2
oklch(66.9% 0.081 239.8)
- #BA8961
#BA8961
oklch(66.9% 0.081 60)
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 #659CC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.034
- Faded Blue #658CBB ΔE 0.044
- Silver Lake Blue #778DA9 ΔE 0.049
- Bluegrey #85A3B2 ΔE 0.051
- Bluey Grey #89A0B0 ΔE 0.052
- Cool Gray #8D99AE ΔE 0.052
- Blue Grey #758DA3 ΔE 0.053
- Cadet Blue #5F9EA0 ΔE 0.055
Use #659CC2 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.