#2B55BD
Closest named color: Blue Blue (#2242C7). oklch(48.3% 0.171 264.3), rgb(43, 85, 189).
Aa
White text reads best on this color (6.69:1).
About this color
#2B55BD is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.171 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.049 away. White text reads best on it, at 6.69:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.13:1 |
| White text | 6.69:1 |
Values
| HEX | #2B55BD |
| RGB | rgb(43, 85, 189) |
| HSL | hsl(223, 63%, 45%) |
| OKLCH | oklch(48.3% 0.171 264.3) |
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 #2B55BD | 6.69:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #2B55BD | 3.13:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #2B55BD text on white | 6.69:1 | AA | Lc 82.5 | Fine for body text |
| #2B55BD text on black | 3.13:1 | AA large text | Lc -19.4 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CAD9F8
oklch(88.4% 0.046 264.9)
-
Step 300
300
#A6C1F7
oklch(81% 0.082 264)
-
Step 400
400
#779EF3
oklch(70.7% 0.132 264.6)
-
Step 500
500
#5483EE
oklch(63% 0.169 264.3)
-
Step 600
600
#3A6ADD
oklch(55.6% 0.184 264.2)
-
Step 700
700 (this color)
#2B55BD
oklch(48.3% 0.171 264.3)
-
Step 800
800
#26489B
oklch(42.6% 0.141 264.4)
-
Step 900
900
#233D7B
oklch(37.6% 0.11 264.6)
-
Step 950
950
#152448
oklch(26.9% 0.07 265)
#2B55BD 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) | #0063C1 | 0.037 |
| Deuteranopia (no green cones) | #0056BB | 0.022 |
| Tritanopia (no blue cones) | #006F80 | 0.135 |
| Achromatopsia (no color) | #5C5C5C | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B55BD
#2B55BD
oklch(48.3% 0.171 264.3)
- #785900
#785900
oklch(48.3% 0.099 85)
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 #2B55BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.049
- Mid Blue #276AB3 ΔE 0.060
- Warm Blue #4B57DB ΔE 0.060
- Majorelle Blue #3F37C9 ΔE 0.067
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
- Iris #6258C4 ΔE 0.071
- Denim Blue #3B5B92 ΔE 0.075
- Azul #1D5DEC ΔE 0.075
Use #2B55BD 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.