#2D55AB
Closest named color: Denim Blue (#3B5B92). oklch(47% 0.145 263.2), rgb(45, 85, 171).
Aa
White text reads best on this color (7.00:1).
About this color
#2D55AB is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.145 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.049 away. White text reads best on it, at 7.00:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #2D55AB |
| RGB | rgb(45, 85, 171) |
| HSL | hsl(221, 58%, 42%) |
| OKLCH | oklch(47% 0.145 263.2) |
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 #2D55AB | 7.00:1 | AAA | Lc -88.8 | Fine for body text |
| Black text on #2D55AB | 2.99:1 | Fails | Lc 20.2 | Dividers and decoration only |
| #2D55AB text on white | 7.00:1 | AAA | Lc 83.9 | Fine for body text |
| #2D55AB text on black | 2.99:1 | Fails | Lc -18.1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF4
oklch(88.6% 0.039 262.9)
-
Step 300
300
#A9C1EF
oklch(80.9% 0.07 263.3)
-
Step 400
400
#7BA0E7
oklch(70.7% 0.112 262.8)
-
Step 500
500
#5A86E0
oklch(63.1% 0.144 263.2)
-
Step 600
600
#416ECE
oklch(55.7% 0.157 263.3)
-
Step 700
700 (this color)
#2D55AB
oklch(47% 0.145 263.2)
-
Step 800
800
#2A4B90
oklch(42.7% 0.121 263.1)
-
Step 900
900
#263F73
oklch(37.6% 0.094 263.2)
-
Step 950
950
#172543
oklch(26.9% 0.059 264)
#2D55AB 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) | #225FAE | 0.027 |
| Deuteranopia (no green cones) | #0054A9 | 0.026 |
| Tritanopia (no blue cones) | #006978 | 0.114 |
| Achromatopsia (no color) | #595959 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D55AB
#2D55AB
oklch(47% 0.145 263.2)
- #755500
#755500
oklch(47.1% 0.097 83.2)
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 #2D55AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.049
- Dusk Blue #26538D ΔE 0.050
- Mid Blue #276AB3 ΔE 0.057
- Dusky Blue #475F94 ΔE 0.059
- Cobalt #1E488F ΔE 0.059
- Light Navy Blue #2E5A88 ΔE 0.061
- Blueberry #464196 ΔE 0.062
- Twilight #4E518B ΔE 0.063
Use #2D55AB 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.