#3D91B2
Closest named color: Blue NCS (#118AB2). oklch(61.9% 0.094 227.3), rgb(61, 145, 178).
Aa
Black text reads best on this color (5.89:1).
About this color
#3D91B2 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.094 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.032 away. Black text reads best on it, at 5.89:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.89:1 |
| White text | 3.56:1 |
Values
| HEX | #3D91B2 |
| RGB | rgb(61, 145, 178) |
| HSL | hsl(197, 49%, 47%) |
| OKLCH | oklch(61.9% 0.094 227.3) |
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 #3D91B2 | 3.56:1 | AA large text | Lc -68.5 | Content text, not long reading |
| Black text on #3D91B2 | 5.89:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #3D91B2 text on white | 3.56:1 | AA large text | Lc 63.0 | Content text, not long reading |
| #3D91B2 text on black | 5.89:1 | AA | Lc -38.7 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A2C7D8
oklch(80.8% 0.046 227.5)
-
Step 400
400
#6DAAC5
oklch(70.7% 0.074 227.8)
-
Step 500
500 (this color)
#3D91B2
oklch(61.9% 0.094 227.3)
-
Step 600
600
#157EA2
oklch(55.5% 0.103 227.9)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#0B5770
oklch(42.7% 0.078 226.9)
-
Step 900
900
#15485B
oklch(37.7% 0.062 227)
-
Step 950
950
#0F2A35
oklch(27% 0.038 227.5)
#3D91B2 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) | #7F8EB4 | 0.069 |
| Deuteranopia (no green cones) | #6F82B2 | 0.062 |
| Tritanopia (no blue cones) | #009B9C | 0.056 |
| Achromatopsia (no color) | #888888 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D91B2
#3D91B2
oklch(61.9% 0.094 227.3)
- #B47453
#B47453
oklch(61.9% 0.094 47.7)
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 #3D91B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.036
- Off Blue #5684AE ΔE 0.039
- Cool Blue #4984B8 ΔE 0.041
- Faded Blue #658CBB ΔE 0.043
- Steel Blue #4682B4 ΔE 0.044
- Teal Blue #01889F ΔE 0.048
- Teal Green #0A9396 ΔE 0.053
Use #3D91B2 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.