#3556BD
Closest named color: Warm Blue (#4B57DB). oklch(48.9% 0.167 266.7), rgb(53, 86, 189).
Aa
White text reads best on this color (6.52:1).
About this color
#3556BD is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.167 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.054 away. White text reads best on it, at 6.52:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.21:1 |
| White text | 6.52:1 |
Values
| HEX | #3556BD |
| RGB | rgb(53, 86, 189) |
| HSL | hsl(225, 56%, 47%) |
| OKLCH | oklch(48.9% 0.167 266.7) |
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 #3556BD | 6.52:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #3556BD | 3.21:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #3556BD text on white | 6.52:1 | AA | Lc 81.9 | Fine for body text |
| #3556BD text on black | 3.21:1 | AA large text | Lc -20.0 | 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
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#A9C0F6
oklch(81% 0.081 266.7)
-
Step 400
400
#7C9DF1
oklch(70.7% 0.129 266.8)
-
Step 500
500
#5C82EC
oklch(63.1% 0.165 266.8)
-
Step 600
600
#4369DB
oklch(55.6% 0.18 266.6)
-
Step 700
700 (this color)
#3556BD
oklch(48.9% 0.167 266.7)
-
Step 800
800
#2C4799
oklch(42.6% 0.138 266.7)
-
Step 900
900
#273D7A
oklch(37.7% 0.107 266.4)
-
Step 950
950
#172447
oklch(26.9% 0.068 266.6)
#3556BD 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) | #0064C1 | 0.040 |
| Deuteranopia (no green cones) | #0058BB | 0.030 |
| Tritanopia (no blue cones) | #006F81 | 0.133 |
| Achromatopsia (no color) | #5E5E5E | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3556BD
#3556BD
oklch(48.9% 0.167 266.7)
- #795B00
#795B00
oklch(48.9% 0.1 86.2)
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 #3556BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.054
- Blue Blue #2242C7 ΔE 0.056
- Mid Blue #276AB3 ΔE 0.057
- Iris #6258C4 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Majorelle Blue #3F37C9 ΔE 0.068
- French Blue #436BAD ΔE 0.069
- Denim Blue #3B5B92 ΔE 0.072
Use #3556BD 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.