#659DBF
Closest named color: Greyblue (#77A1B5). oklch(67% 0.078 236.2), rgb(101, 157, 191).
Aa
Black text reads best on this color (7.12:1).
About this color
#659DBF 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 0.029 away. Black text reads best on it, at 7.12:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.12:1 |
| White text | 2.94:1 |
Values
| HEX | #659DBF |
| RGB | rgb(101, 157, 191) |
| HSL | hsl(203, 41%, 57%) |
| OKLCH | oklch(67% 0.078 236.2) |
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 #659DBF | 2.94:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #659DBF | 7.12:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #659DBF text on white | 2.94:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #659DBF text on black | 7.12:1 | AAA | Lc -45.9 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
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
#A4C6DC
oklch(80.9% 0.048 236.6)
-
Step 400
400 (this color)
#659DBF
oklch(67% 0.078 236.2)
-
Step 500
500
#4692BD
oklch(63% 0.099 236.1)
-
Step 600
600
#217CAA
oklch(55.6% 0.108 236.3)
-
Step 700
700
#116892
oklch(49% 0.101 236.7)
-
Step 800
800
#145576
oklch(42.7% 0.083 236.3)
-
Step 900
900
#19465F
oklch(37.5% 0.065 236.6)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#659DBF 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) | #8D9CC1 | 0.048 |
| Deuteranopia (no green cones) | #8192BE | 0.042 |
| Tritanopia (no blue cones) | #3BA6A8 | 0.061 |
| Achromatopsia (no color) | #969696 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659DBF
#659DBF
oklch(67% 0.078 236.2)
- #BB8966
#BB8966
oklch(67.1% 0.078 55.9)
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 #659DBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.029
- Bluegrey #85A3B2 ΔE 0.047
- Faded Blue #658CBB ΔE 0.047
- Silver Lake Blue #778DA9 ΔE 0.048
- Bluey Grey #89A0B0 ΔE 0.049
- Cadet Blue #5F9EA0 ΔE 0.050
- Cool Gray #8D99AE ΔE 0.050
- Blue Grey #758DA3 ΔE 0.052
Use #659DBF 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.