#3697BC
Closest named color: Blue NCS (#118AB2). oklch(63.6% 0.104 227.5), rgb(54, 151, 188).
Aa
Black text reads best on this color (6.30:1).
About this color
#3697BC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.104 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.044 away. Black text reads best on it, at 6.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.30:1 |
| White text | 3.32:1 |
Values
| HEX | #3697BC |
| RGB | rgb(54, 151, 188) |
| HSL | hsl(197, 55%, 47%) |
| OKLCH | oklch(63.6% 0.104 227.5) |
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 #3697BC | 3.32:1 | AA large text | Lc -65.8 | Content text, not long reading |
| Black text on #3697BC | 6.30:1 | AA | Lc 43.7 | Non-text elements, placeholder text |
| #3697BC text on white | 3.32:1 | AA large text | Lc 60.4 | Content text, not long reading |
| #3697BC text on black | 6.30:1 | AA | Lc -41.3 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C7DDE8
oklch(88.5% 0.028 229.2)
-
Step 300
300
#9FC8DB
oklch(81% 0.051 227.9)
-
Step 400
400
#67ABC8
oklch(70.7% 0.081 227.3)
-
Step 500
500 (this color)
#3697BC
oklch(63.6% 0.104 227.5)
-
Step 600
600
#007FA4
oklch(55.6% 0.108 227.1)
-
Step 700
700
#006B8B
oklch(49.2% 0.095 227.3)
-
Step 800
800
#005772
oklch(42.6% 0.083 227.6)
-
Step 900
900
#0C485E
oklch(37.7% 0.068 228.5)
-
Step 950
950
#0B2A37
oklch(26.9% 0.043 229.3)
#3697BC 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) | #8394BE | 0.076 |
| Deuteranopia (no green cones) | #7187BC | 0.066 |
| Tritanopia (no blue cones) | #00A2A3 | 0.060 |
| Achromatopsia (no color) | #8D8D8D | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3697BC
#3697BC
oklch(63.6% 0.104 227.5)
- #BE7652
#BE7652
oklch(63.5% 0.104 46.9)
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 #3697BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.044
- Faded Blue #658CBB ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.051
- Cool Blue #4984B8 ΔE 0.053
- Off Blue #5684AE ΔE 0.054
- Steel Blue #4682B4 ΔE 0.058
- Cadet Blue #5F9EA0 ΔE 0.061
- Water Blue #0E87CC ΔE 0.061
Use #3697BC 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.