#659DB5
Closest named color: Greyblue (#77A1B5). oklch(66.6% 0.069 227), rgb(101, 157, 181).
Aa
Black text reads best on this color (7.04:1).
About this color
#659DB5 is a medium-light, muted teal or cyan. In OKLCH its lightness is 67%, its chroma 0.069 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.024 away. Black text reads best on it, at 7.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #659DB5 |
| RGB | rgb(101, 157, 181) |
| HSL | hsl(198, 35%, 55%) |
| OKLCH | oklch(66.6% 0.069 227) |
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 #659DB5 | 2.98:1 | Fails | Lc -61.7 | Content text, not long reading |
| Black text on #659DB5 | 7.04:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #659DB5 text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #659DB5 text on black | 7.04:1 | AAA | Lc -45.4 | 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 500.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#ABC6D2
oklch(81% 0.034 226.4)
-
Step 400
400
#7DA8BB
oklch(70.7% 0.054 227)
-
Step 500
500 (this color)
#659DB5
oklch(66.6% 0.069 227)
-
Step 600
600
#3E7C95
oklch(55.5% 0.075 226.8)
-
Step 700
700
#30697F
oklch(49.2% 0.069 226.1)
-
Step 800
800
#295567
oklch(42.6% 0.057 227.1)
-
Step 900
900
#264654
oklch(37.6% 0.045 228.1)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#659DB5 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) | #909BB6 | 0.052 |
| Deuteranopia (no green cones) | #8591B5 | 0.048 |
| Tritanopia (no blue cones) | #42A4A5 | 0.047 |
| Achromatopsia (no color) | #959595 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659DB5
#659DB5
oklch(66.6% 0.069 227)
- #B88770
#B88770
oklch(66.5% 0.069 46.2)
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 #659DB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.024
- Cadet Blue #5F9EA0 ΔE 0.034
- Bluegrey #85A3B2 ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.044
- Silver Lake Blue #778DA9 ΔE 0.045
- Blue Grey #758DA3 ΔE 0.046
- Cool Gray #8D99AE ΔE 0.047
- Faded Blue #658CBB ΔE 0.052
Use #659DB5 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.