#3D55B9
Closest named color: Iris (#6258C4). oklch(48.8% 0.16 269.4), rgb(61, 85, 185).
Aa
White text reads best on this color (6.56:1).
About this color
#3D55B9 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.160 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.056 away. White text reads best on it, at 6.56:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.19:1 |
| White text | 6.56:1 |
Values
| HEX | #3D55B9 |
| RGB | rgb(61, 85, 185) |
| HSL | hsl(228, 50%, 48%) |
| OKLCH | oklch(48.8% 0.16 269.4) |
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 #3D55B9 | 6.56:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #3D55B9 | 3.19:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #3D55B9 text on white | 6.56:1 | AA | Lc 82.1 | Fine for body text |
| #3D55B9 text on black | 3.19:1 | AA large text | Lc -19.8 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F7
oklch(88.6% 0.043 269.5)
-
Step 300
300
#ACBFF4
oklch(80.9% 0.078 269.3)
-
Step 400
400
#829CEE
oklch(70.7% 0.124 269.7)
-
Step 500
500
#6481E8
oklch(63.1% 0.158 269.6)
-
Step 600
600
#4C68D7
oklch(55.6% 0.173 269.4)
-
Step 700
700 (this color)
#3D55B9
oklch(48.8% 0.16 269.4)
-
Step 800
800
#334796
oklch(42.7% 0.132 269.4)
-
Step 900
900
#2C3C78
oklch(37.6% 0.104 269.6)
-
Step 950
950
#1A2446
oklch(27.1% 0.065 269.4)
#3D55B9 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) | #0B63BC | 0.044 |
| Deuteranopia (no green cones) | #0058B7 | 0.039 |
| Tritanopia (no blue cones) | #006D7F | 0.131 |
| Achromatopsia (no color) | #5D5D5D | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D55B9
#3D55B9
oklch(48.8% 0.16 269.4)
- #765C00
#765C00
oklch(48.7% 0.1 89.5)
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 #3D55B9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.057
- Mid Blue #276AB3 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- French Blue #436BAD ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.067
- Bluey Purple #6241C7 ΔE 0.069
Use #3D55B9 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.