#0155D2
Closest named color: Blue Blue (#2242C7). oklch(49.2% 0.205 260.5), rgb(1, 85, 210).
Aa
White text reads best on this color (6.49:1).
About this color
#0155D2 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.205 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.045 away. White text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.205) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.23:1 |
| White text | 6.49:1 |
Values
| HEX | #0155D2 |
| RGB | rgb(1, 85, 210) |
| HSL | hsl(216, 99%, 41%) |
| OKLCH | oklch(49.2% 0.205 260.5) |
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 #0155D2 | 6.49:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #0155D2 | 3.23:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #0155D2 text on white | 6.49:1 | AA | Lc 81.2 | Fine for body text |
| #0155D2 text on black | 3.23:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFE
oklch(88.4% 0.055 261.2)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3B83FF
oklch(63.1% 0.198 260.5)
-
Step 600
600
#1167F1
oklch(55.5% 0.221 260.6)
-
Step 700
700 (this color)
#0155D2
oklch(49.2% 0.205 260.5)
-
Step 800
800
#0846AA
oklch(42.7% 0.171 260.6)
-
Step 900
900
#113D86
oklch(37.8% 0.132 260.2)
-
Step 950
950
#0C244F
oklch(27% 0.085 261)
#0155D2 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) | #0067D6 | 0.045 |
| Deuteranopia (no green cones) | #0055D0 | 0.003 |
| Tritanopia (no blue cones) | #00768B | 0.156 |
| Achromatopsia (no color) | #5E5E5E | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0155D2
#0155D2
oklch(49.2% 0.205 260.5)
- #7E5900
#7E5900
oklch(49% 0.101 80.5)
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 #0155D2, closest first.
No curated palette has a color within ΔE 0.04 of #0155D2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.045
- Azul #1D5DEC ΔE 0.048
- Warm Blue #4B57DB ΔE 0.058
- Electric Blue #0652FF ΔE 0.069
- Majorelle Blue #3F37C9 ΔE 0.070
- Neon Blue #4361EE ΔE 0.072
- Royal Blue #4169E1 ΔE 0.073
- Cerulean Blue #056EEE ΔE 0.075
Use #0155D2 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.