#0055B1
Closest named color: Blue Blue (#2242C7). oklch(46.4% 0.163 256.7), rgb(0, 85, 177).
Aa
White text reads best on this color (7.15:1).
About this color
#0055B1 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.163 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.057 away. White text reads best on it, at 7.15:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #0055B1 |
| RGB | rgb(0, 85, 177) |
| HSL | hsl(211, 100%, 35%) |
| OKLCH | oklch(46.4% 0.163 256.7) |
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 #0055B1 | 7.15:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #0055B1 | 2.93:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #0055B1 text on white | 7.15:1 | AAA | Lc 84.0 | Fine for body text |
| #0055B1 text on black | 2.93:1 | Fails | Lc -17.9 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F4
oklch(80.9% 0.079 256.8)
-
Step 400
400
#6BA2EE
oklch(70.6% 0.126 256.7)
-
Step 500
500
#4289E8
oklch(63.1% 0.16 256.6)
-
Step 600
600
#1E70D7
oklch(55.6% 0.176 256.8)
-
Step 700
700 (this color)
#0055B1
oklch(46.4% 0.163 256.7)
-
Step 800
800
#114D96
oklch(42.7% 0.134 256.4)
-
Step 900
900
#174178
oklch(37.8% 0.105 256.6)
-
Step 950
950
#0F2646
oklch(26.9% 0.066 257.2)
#0055B1 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) | #115FB4 | 0.029 |
| Deuteranopia (no green cones) | #0051AF | 0.011 |
| Tritanopia (no blue cones) | #006C7B | 0.122 |
| Achromatopsia (no color) | #585858 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0055B1
#0055B1
oklch(46.4% 0.163 256.7)
- #775000
#775000
oklch(46.3% 0.097 76.5)
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 #0055B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.057
- Dusk Blue #26538D ΔE 0.059
- Cobalt #1E488F ΔE 0.062
- Mid Blue #276AB3 ΔE 0.064
- Denim Blue #3B5B92 ΔE 0.067
- Sapphire #2138AB ΔE 0.069
- Light Navy #155084 ΔE 0.073
- Light Navy Blue #2E5A88 ΔE 0.074
Use #0055B1 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.