#3380B8
Closest named color: Steel Blue (#4682B4). oklch(57.8% 0.114 243.8), rgb(51, 128, 184).
Aa
Black text reads best on this color (4.92:1).
About this color
#3380B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.114 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.018 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #3380B8 |
| RGB | rgb(51, 128, 184) |
| HSL | hsl(205, 57%, 46%) |
| OKLCH | oklch(57.8% 0.114 243.8) |
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 #3380B8 | 4.26:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #3380B8 | 4.92:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #3380B8 text on white | 4.26:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #3380B8 text on black | 4.92:1 | AA | Lc -32.5 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5E0
oklch(80.9% 0.052 243.9)
-
Step 400
400
#73A7D0
oklch(70.7% 0.082 243)
-
Step 500
500
#4C90C4
oklch(63.1% 0.105 243.7)
-
Step 600
600 (this color)
#3380B8
oklch(57.8% 0.114 243.8)
-
Step 700
700
#1D6698
oklch(49.1% 0.106 243.7)
-
Step 800
800
#1B537B
oklch(42.6% 0.088 243.9)
-
Step 900
900
#1D4563
oklch(37.7% 0.068 243.8)
-
Step 950
950
#12293A
oklch(27.1% 0.043 242.6)
#3380B8 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) | #6681BA | 0.051 |
| Deuteranopia (no green cones) | #5475B7 | 0.039 |
| Tritanopia (no blue cones) | #008E94 | 0.082 |
| Achromatopsia (no color) | #7A7A7A | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3380B8
#3380B8
oklch(57.8% 0.114 243.8)
- #A86924
#A86924
oklch(57.8% 0.114 63.8)
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 #3380B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.018
- Cool Blue #4984B8 ΔE 0.023
- Windows Blue #3778BF ΔE 0.027
- Nice Blue #107AB0 ΔE 0.029
- Water Blue #0E87CC ΔE 0.033
- Blue NCS #118AB2 ΔE 0.034
- Off Blue #5684AE ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.039
Use #3380B8 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.