#659DBB
Closest named color: Greyblue (#77A1B5). oklch(66.9% 0.074 232.8), rgb(101, 157, 187).
Aa
Black text reads best on this color (7.09:1).
About this color
#659DBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.074 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.026 away. Black text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.09:1 |
| White text | 2.96:1 |
Values
| HEX | #659DBB |
| RGB | rgb(101, 157, 187) |
| HSL | hsl(201, 39%, 56%) |
| OKLCH | oklch(66.9% 0.074 232.8) |
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 #659DBB | 2.96:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #659DBB | 7.09:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #659DBB text on white | 2.96:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #659DBB text on black | 7.09:1 | 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 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
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#AAC5D4
oklch(80.8% 0.036 232.2)
-
Step 400
400
#7DA7BF
oklch(70.6% 0.057 233.7)
-
Step 500
500 (this color)
#659DBB
oklch(66.9% 0.074 232.8)
-
Step 600
600
#3D7B9B
oklch(55.5% 0.081 233.3)
-
Step 700
700
#2F6884
oklch(49.1% 0.074 232.4)
-
Step 800
800
#28556B
oklch(42.8% 0.061 231.9)
-
Step 900
900
#254657
oklch(37.7% 0.048 232.5)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#659DBB 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) | #8F9BBD | 0.051 |
| Deuteranopia (no green cones) | #8292BB | 0.043 |
| Tritanopia (no blue cones) | #3EA5A7 | 0.055 |
| Achromatopsia (no color) | #969696 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659DBB
#659DBB
oklch(66.9% 0.074 232.8)
- #B9886A
#B9886A
oklch(66.7% 0.074 52.6)
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 #659DBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.026
- Cadet Blue #5F9EA0 ΔE 0.043
- Bluegrey #85A3B2 ΔE 0.045
- Bluey Grey #89A0B0 ΔE 0.046
- Silver Lake Blue #778DA9 ΔE 0.047
- Cool Gray #8D99AE ΔE 0.048
- Faded Blue #658CBB ΔE 0.049
- Blue Grey #758DA3 ΔE 0.049
Use #659DBB 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.