#3391BA
Closest named color: Blue NCS (#118AB2). oklch(62% 0.106 231), rgb(51, 145, 186).
Aa
Black text reads best on this color (5.89:1).
About this color
#3391BA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.106 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.029 away. Black text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.89:1 |
| White text | 3.55:1 |
Values
| HEX | #3391BA |
| RGB | rgb(51, 145, 186) |
| HSL | hsl(198, 57%, 46%) |
| OKLCH | oklch(62% 0.106 231) |
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 #3391BA | 3.55:1 | AA large text | Lc -68.3 | Content text, not long reading |
| Black text on #3391BA | 5.89:1 | AA | Lc 41.2 | Non-text elements, placeholder text |
| #3391BA text on white | 3.55:1 | AA large text | Lc 62.9 | Content text, not long reading |
| #3391BA text on black | 5.89:1 | AA | Lc -38.8 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C7DDE9
oklch(88.5% 0.029 231.5)
-
Step 300
300
#9FC7DC
oklch(80.8% 0.052 231.1)
-
Step 400
400
#68AACB
oklch(70.6% 0.083 231.3)
-
Step 500
500 (this color)
#3391BA
oklch(62% 0.106 231)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#0E485F
oklch(37.8% 0.068 230.1)
-
Step 950
950
#0C2A38
oklch(27% 0.044 231.9)
#3391BA 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) | #7C8FBC | 0.071 |
| Deuteranopia (no green cones) | #6A82B9 | 0.061 |
| Tritanopia (no blue cones) | #009C9F | 0.062 |
| Achromatopsia (no color) | #888888 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3391BA
#3391BA
oklch(62% 0.106 231)
- #B87248
#B87248
oklch(61.9% 0.105 50.8)
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 #3391BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.029
- Cool Blue #4984B8 ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.041
- Steel Blue #4682B4 ΔE 0.042
- Off Blue #5684AE ΔE 0.042
- Faded Blue #658CBB ΔE 0.044
- Water Blue #0E87CC ΔE 0.048
- Teal Blue #01889F ΔE 0.052
Use #3391BA 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.