#2B55CC
Closest named color: Warm Blue (#4B57DB). oklch(49.5% 0.191 265.1), rgb(43, 85, 204).
Aa
White text reads best on this color (6.41:1).
About this color
#2B55CC is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.191 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.043 away. White text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #2B55CC |
| RGB | rgb(43, 85, 204) |
| HSL | hsl(224, 65%, 48%) |
| OKLCH | oklch(49.5% 0.191 265.1) |
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 #2B55CC | 6.41:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #2B55CC | 3.27:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #2B55CC text on white | 6.41:1 | AA | Lc 81.2 | Fine for body text |
| #2B55CC text on black | 3.27:1 | AA large text | Lc -20.6 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C9D9FC
oklch(88.5% 0.051 265.9)
-
Step 300
300
#A4C0FD
oklch(80.9% 0.092 265.3)
-
Step 400
400
#739DFC
oklch(70.7% 0.147 264.9)
-
Step 500
500
#5081FA
oklch(63.2% 0.188 264.9)
-
Step 600
600
#3766E9
oklch(55.6% 0.205 265.2)
-
Step 700
700 (this color)
#2B55CC
oklch(49.5% 0.191 265.1)
-
Step 800
800
#2345A4
oklch(42.6% 0.159 265.2)
-
Step 900
900
#213C82
oklch(37.8% 0.123 265.1)
-
Step 950
950
#13244C
oklch(27.1% 0.077 264.5)
#2B55CC 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) | #0066D0 | 0.042 |
| Deuteranopia (no green cones) | #0058CA | 0.021 |
| Tritanopia (no blue cones) | #007388 | 0.149 |
| Achromatopsia (no color) | #5F5F5F | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B55CC
#2B55CC
oklch(49.5% 0.191 265.1)
- #7C5C00
#7C5C00
oklch(49.4% 0.101 84.9)
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 #2B55CC, closest first.
No curated palette has a color within ΔE 0.04 of #2B55CC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.043
- Blue Blue #2242C7 ΔE 0.047
- Azul #1D5DEC ΔE 0.052
- Majorelle Blue #3F37C9 ΔE 0.063
- Royal Blue #4169E1 ΔE 0.065
- Neon Blue #4361EE ΔE 0.067
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
- Iris #6258C4 ΔE 0.070
Use #2B55CC 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.