#659DA4
Closest named color: Cadet Blue (#5F9EA0). oklch(66% 0.06 205.8), rgb(101, 157, 164).
Aa
Black text reads best on this color (6.91:1).
About this color
#659DA4 is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.060 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.010 away. Black text reads best on it, at 6.91:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.91:1 |
| White text | 3.03:1 |
Values
| HEX | #659DA4 |
| RGB | rgb(101, 157, 164) |
| HSL | hsl(187, 26%, 52%) |
| OKLCH | oklch(66% 0.06 205.8) |
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 #659DA4 | 3.03:1 | AA large text | Lc -62.5 | Content text, not long reading |
| Black text on #659DA4 | 6.91:1 | AA | Lc 47.0 | Large or bold text, headings |
| #659DA4 text on white | 3.03:1 | AA large text | Lc 57.1 | Large or bold text, headings |
| #659DA4 text on black | 6.91:1 | AA | Lc -44.7 | Non-text elements, placeholder text |
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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CEDCDE
oklch(88.4% 0.015 207.1)
-
Step 300
300
#ACC6CA
oklch(80.8% 0.029 207.8)
-
Step 400
400
#7FA9AF
oklch(70.6% 0.046 207.1)
-
Step 500
500 (this color)
#659DA4
oklch(66% 0.06 205.8)
-
Step 600
600
#407E86
oklch(55.5% 0.065 206.5)
-
Step 700
700
#326B71
oklch(49.2% 0.06 204.5)
-
Step 800
800
#2A575C
oklch(42.7% 0.05 205)
-
Step 900
900
#27484C
oklch(37.8% 0.039 205.6)
-
Step 950
950
#172A2C
oklch(27% 0.025 204.3)
#659DA4 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) | #9599A5 | 0.060 |
| Deuteranopia (no green cones) | #8A90A4 | 0.055 |
| Tritanopia (no blue cones) | #4BA19F | 0.028 |
| Achromatopsia (no color) | #949494 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659DA4
#659DA4
oklch(66% 0.06 205.8)
- #B4847F
#B4847F
oklch(65.9% 0.06 25.6)
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 #659DA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.010
- Dull Teal #5F9E8F ΔE 0.034
- Greyblue #77A1B5 ΔE 0.035
- Grey Teal #5E9B8A ΔE 0.040
- Blue Grey #758DA3 ΔE 0.047
- Bluegrey #85A3B2 ΔE 0.047
- Bluey Grey #89A0B0 ΔE 0.049
- Sea #3C9992 ΔE 0.049
Use #659DA4 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.