#3155A4
Closest named color: Denim Blue (#3B5B92). oklch(46.6% 0.134 263.6), rgb(49, 85, 164).
Aa
White text reads best on this color (7.08:1).
About this color
#3155A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.134 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.038 away. White text reads best on it, at 7.08:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.96:1 |
| White text | 7.08:1 |
Values
| HEX | #3155A4 |
| RGB | rgb(49, 85, 164) |
| HSL | hsl(221, 54%, 42%) |
| OKLCH | oklch(46.6% 0.134 263.6) |
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 #3155A4 | 7.08:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #3155A4 | 2.96:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #3155A4 text on white | 7.08:1 | AAA | Lc 84.2 | Fine for body text |
| #3155A4 text on black | 2.96:1 | Fails | Lc -17.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#ABC1EB
oklch(80.9% 0.064 263.3)
-
Step 400
400
#7FA0E2
oklch(70.7% 0.104 263.6)
-
Step 500
500
#5F87D9
oklch(63.1% 0.132 263.4)
-
Step 600
600
#466FC7
oklch(55.6% 0.144 263.6)
-
Step 700
700 (this color)
#3155A4
oklch(46.6% 0.134 263.6)
-
Step 800
800
#2E4C8B
oklch(42.7% 0.111 263.3)
-
Step 900
900
#29406F
oklch(37.8% 0.086 263.2)
-
Step 950
950
#182641
oklch(27.1% 0.054 262.5)
#3155A4 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) | #2B5EA7 | 0.024 |
| Deuteranopia (no green cones) | #0F53A2 | 0.026 |
| Tritanopia (no blue cones) | #006774 | 0.108 |
| Achromatopsia (no color) | #585858 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3155A4
#3155A4
oklch(46.6% 0.134 263.6)
- #735400
#735400
oklch(46.6% 0.096 83.8)
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 #3155A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.038
- Dusk Blue #26538D ΔE 0.040
- Dusky Blue #475F94 ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.051
- Twilight #4E518B ΔE 0.052
- Cobalt #1E488F ΔE 0.054
- Blueberry #464196 ΔE 0.057
- Mid Blue #276AB3 ΔE 0.059
Use #3155A4 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.