#0055CF
Closest named color: Blue Blue (#2242C7). oklch(48.9% 0.201 260.2), rgb(0, 85, 207).
Aa
White text reads best on this color (6.56:1).
About this color
#0055CF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.201 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.044 away. White text reads best on it, at 6.56:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.20:1 |
| White text | 6.56:1 |
Values
| HEX | #0055CF |
| RGB | rgb(0, 85, 207) |
| HSL | hsl(215, 100%, 41%) |
| OKLCH | oklch(48.9% 0.201 260.2) |
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 #0055CF | 6.56:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #0055CF | 3.20:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #0055CF text on white | 6.56:1 | AA | Lc 81.5 | Fine for body text |
| #0055CF text on black | 3.20:1 | AA large text | Lc -20.4 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFE
oklch(88.4% 0.055 261.2)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3983FF
oklch(63.1% 0.199 260.2)
-
Step 600
600
#1268EF
oklch(55.6% 0.217 260.3)
-
Step 700
700 (this color)
#0055CF
oklch(48.9% 0.201 260.2)
-
Step 800
800
#0847A8
oklch(42.7% 0.167 260.2)
-
Step 900
900
#123D85
oklch(37.7% 0.13 260.3)
-
Step 950
950
#0C244E
oklch(26.9% 0.083 260.7)
#0055CF 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) | #0066D3 | 0.043 |
| Deuteranopia (no green cones) | #0055CD | 0.003 |
| Tritanopia (no blue cones) | #00758A | 0.153 |
| Achromatopsia (no color) | #5D5D5D | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0055CF
#0055CF
oklch(48.9% 0.201 260.2)
- #7E5800
#7E5800
oklch(48.8% 0.101 79.5)
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 #0055CF, closest first.
No curated palette has a color within ΔE 0.04 of #0055CF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.044
- Azul #1D5DEC ΔE 0.052
- Warm Blue #4B57DB ΔE 0.060
- Majorelle Blue #3F37C9 ΔE 0.069
- Electric Blue #0652FF ΔE 0.074
- Royal Blue #4169E1 ΔE 0.075
- Neon Blue #4361EE ΔE 0.075
- Mid Blue #276AB3 ΔE 0.077
Use #0055CF 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.