#3697B1
Closest named color: Blue NCS (#118AB2). oklch(63.1% 0.096 219.2), rgb(54, 151, 177).
Aa
Black text reads best on this color (6.21:1).
About this color
#3697B1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.096 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.045 away. Black text reads best on it, at 6.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.21:1 |
| White text | 3.37:1 |
Values
| HEX | #3697B1 |
| RGB | rgb(54, 151, 177) |
| HSL | hsl(193, 53%, 45%) |
| OKLCH | oklch(63.1% 0.096 219.2) |
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 #3697B1 | 3.37:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #3697B1 | 6.21:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #3697B1 text on white | 3.37:1 | AA large text | Lc 60.9 | Content text, not long reading |
| #3697B1 text on black | 6.21:1 | AA | Lc -40.8 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C7DEE5
oklch(88.6% 0.026 218)
-
Step 300
300
#9FC8D5
oklch(80.8% 0.047 219.1)
-
Step 400
400
#68ACC1
oklch(70.7% 0.075 219.7)
-
Step 500
500 (this color)
#3697B1
oklch(63.1% 0.096 219.2)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#0D4958
oklch(37.6% 0.063 219.2)
-
Step 950
950
#0B2B34
oklch(27% 0.04 219.8)
#3697B1 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) | #8793B2 | 0.081 |
| Deuteranopia (no green cones) | #7686B1 | 0.074 |
| Tritanopia (no blue cones) | #00A09F | 0.047 |
| Achromatopsia (no color) | #8C8C8C | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3697B1
#3697B1
oklch(63.1% 0.096 219.2)
- #BB755D
#BB755D
oklch(63.1% 0.095 39.7)
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 #3697B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.045
- Teal Green #0A9396 ΔE 0.047
- Sea #3C9992 ΔE 0.050
- Cadet Blue #5F9EA0 ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.052
- Faded Blue #658CBB ΔE 0.055
- Teal Blue #01889F ΔE 0.055
- Off Blue #5684AE ΔE 0.056
Use #3697B1 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.