#055AC3
Closest named color: Blue Blue (#2242C7). oklch(49% 0.179 258.2), rgb(5, 90, 195).
Aa
White text reads best on this color (6.44:1).
About this color
#055AC3 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.179 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.055 away. White text reads best on it, at 6.44:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.25:1 |
| White text | 6.44:1 |
Values
| HEX | #055AC3 |
| RGB | rgb(5, 90, 195) |
| HSL | hsl(213, 95%, 39%) |
| OKLCH | oklch(49% 0.179 258.2) |
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 #055AC3 | 6.44:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #055AC3 | 3.25:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #055AC3 text on white | 6.44:1 | AA | Lc 81.2 | Fine for body text |
| #055AC3 text on black | 3.25:1 | AA large text | Lc -20.7 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9EC3F9
oklch(81% 0.087 257.7)
-
Step 400
400
#68A1F6
oklch(70.7% 0.139 258.2)
-
Step 500
500
#3D87F2
oklch(63.2% 0.177 258)
-
Step 600
600
#176DE1
oklch(55.5% 0.193 258.3)
-
Step 700
700 (this color)
#055AC3
oklch(49% 0.179 258.2)
-
Step 800
800
#0C4B9E
oklch(42.8% 0.148 258)
-
Step 900
900
#143F7E
oklch(37.7% 0.117 258.5)
-
Step 950
950
#0D2649
oklch(27.1% 0.072 257.4)
#055AC3 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) | #0067C7 | 0.034 |
| Deuteranopia (no green cones) | #0057C1 | 0.009 |
| Tritanopia (no blue cones) | #007486 | 0.134 |
| Achromatopsia (no color) | #5E5E5E | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #055AC3
#055AC3
oklch(49% 0.179 258.2)
- #7F5800
#7F5800
oklch(49% 0.102 78.8)
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 #055AC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.055
- Mid Blue #276AB3 ΔE 0.057
- Warm Blue #4B57DB ΔE 0.065
- Azul #1D5DEC ΔE 0.066
- Royal Blue #4169E1 ΔE 0.076
- French Blue #436BAD ΔE 0.077
- Majorelle Blue #3F37C9 ΔE 0.080
- Cerulean Blue #056EEE ΔE 0.082
Use #055AC3 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.