#3383A7
Closest named color: Blue NCS (#118AB2). oklch(57.7% 0.094 231.2), rgb(51, 131, 167).
Aa
Black text reads best on this color (4.94:1).
About this color
#3383A7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.094 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.024 away. Black text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #3383A7 |
| RGB | rgb(51, 131, 167) |
| HSL | hsl(199, 53%, 43%) |
| OKLCH | oklch(57.7% 0.094 231.2) |
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 #3383A7 | 4.24:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #3383A7 | 4.94:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #3383A7 text on white | 4.24:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #3383A7 text on black | 4.94:1 | AA | Lc -32.6 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A6C6D7
oklch(80.9% 0.042 231.1)
-
Step 400
400
#74A9C4
oklch(70.8% 0.068 231.1)
-
Step 500
500
#4D93B5
oklch(63.1% 0.087 231.5)
-
Step 600
600 (this color)
#3383A7
oklch(57.7% 0.094 231.2)
-
Step 700
700
#1D6989
oklch(49.1% 0.087 231)
-
Step 800
800
#1B5670
oklch(42.8% 0.073 231.3)
-
Step 900
900
#1D475A
oklch(37.7% 0.057 230.4)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#3383A7 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) | #7181A9 | 0.064 |
| Deuteranopia (no green cones) | #6176A6 | 0.054 |
| Tritanopia (no blue cones) | #008D8F | 0.058 |
| Achromatopsia (no color) | #7B7B7B | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3383A7
#3383A7
oklch(57.7% 0.094 231.2)
- #A66843
#A66843
oklch(57.7% 0.095 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 #3383A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.024
- Cerulean #457B9D ΔE 0.026
- Steel Blue #4682B4 ΔE 0.027
- Teal Blue #01889F ΔE 0.028
- Stormy Blue #507B9C ΔE 0.031
- Cool Blue #4984B8 ΔE 0.034
- Off Blue #5684AE ΔE 0.034
- Nice Blue #107AB0 ΔE 0.039
Use #3383A7 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.