#659CBE
Closest named color: Greyblue (#77A1B5). oklch(66.8% 0.077 236.7), rgb(101, 156, 190).
Aa
Black text reads best on this color (7.05:1).
About this color
#659CBE is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.077 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.030 away. Black text reads best on it, at 7.05:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.05:1 |
| White text | 2.97:1 |
Values
| HEX | #659CBE |
| RGB | rgb(101, 156, 190) |
| HSL | hsl(203, 41%, 57%) |
| OKLCH | oklch(66.8% 0.077 236.7) |
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 #659CBE | 2.97:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #659CBE | 7.05:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #659CBE text on white | 2.97:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #659CBE text on black | 7.05:1 | AAA | Lc -45.5 | 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 500.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#ABC5D6
oklch(80.9% 0.037 236.6)
-
Step 400
400
#7DA7C2
oklch(70.8% 0.06 236.9)
-
Step 500
500 (this color)
#659CBE
oklch(66.8% 0.077 236.7)
-
Step 600
600
#3E7B9E
oklch(55.7% 0.083 236.1)
-
Step 700
700
#306787
oklch(49.1% 0.077 236.8)
-
Step 800
800
#28546E
oklch(42.6% 0.065 236.9)
-
Step 900
900
#264659
oklch(37.8% 0.05 236.2)
-
Step 950
950
#172934
oklch(27.1% 0.031 236.4)
#659CBE 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) | #8C9BC0 | 0.047 |
| Deuteranopia (no green cones) | #8091BD | 0.041 |
| Tritanopia (no blue cones) | #3CA5A7 | 0.061 |
| Achromatopsia (no color) | #959595 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659CBE
#659CBE
oklch(66.8% 0.077 236.7)
- #B98966
#B98966
oklch(66.8% 0.076 57.1)
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 #659CBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.030
- Faded Blue #658CBB ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.046
- Bluegrey #85A3B2 ΔE 0.048
- Cadet Blue #5F9EA0 ΔE 0.049
- Bluey Grey #89A0B0 ΔE 0.049
- Blue Grey #758DA3 ΔE 0.050
- Cool Gray #8D99AE ΔE 0.050
Use #659CBE 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.