#0455C9
Closest named color: Blue Blue (#2242C7). oklch(48.4% 0.193 259.9), rgb(4, 85, 201).
Aa
White text reads best on this color (6.67:1).
About this color
#0455C9 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.193 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.042 away. White text reads best on it, at 6.67:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #0455C9 |
| RGB | rgb(4, 85, 201) |
| HSL | hsl(215, 96%, 40%) |
| OKLCH | oklch(48.4% 0.193 259.9) |
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 #0455C9 | 6.67:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #0455C9 | 3.14:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #0455C9 text on white | 6.67:1 | AA | Lc 82.0 | Fine for body text |
| #0455C9 text on black | 3.14:1 | AA large text | Lc -19.9 | 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
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C5DAFC
oklch(88.4% 0.052 260)
-
Step 300
300
#9DC2FD
oklch(80.9% 0.093 259.6)
-
Step 400
400
#67A0FD
oklch(70.8% 0.149 259.7)
-
Step 500
500
#3C84FB
oklch(63.1% 0.192 260)
-
Step 600
600
#176AEA
oklch(55.6% 0.208 259.9)
-
Step 700
700 (this color)
#0455C9
oklch(48.4% 0.193 259.9)
-
Step 800
800
#0D48A4
oklch(42.6% 0.16 260)
-
Step 900
900
#143E82
oklch(37.8% 0.124 259.8)
-
Step 950
950
#0D254C
oklch(27% 0.078 259.7)
#0455C9 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) | #0065CD | 0.041 |
| Deuteranopia (no green cones) | #0054C7 | 0.004 |
| Tritanopia (no blue cones) | #007386 | 0.148 |
| Achromatopsia (no color) | #5C5C5C | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0455C9
#0455C9
oklch(48.4% 0.193 259.9)
- #7C5700
#7C5700
oklch(48.4% 0.1 80)
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 #0455C9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.042
- Azul #1D5DEC ΔE 0.060
- Warm Blue #4B57DB ΔE 0.063
- Majorelle Blue #3F37C9 ΔE 0.069
- Mid Blue #276AB3 ΔE 0.072
- Royal Blue #4169E1 ΔE 0.079
- Blue With A Hint Of Purple #533CC6 ΔE 0.081
- Neon Blue #4361EE ΔE 0.081
Use #0455C9 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.