#0A55BE
Closest named color: Blue Blue (#2242C7). oklch(47.5% 0.178 259.3), rgb(10, 85, 190).
Aa
White text reads best on this color (6.87:1).
About this color
#0A55BE is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.178 and its hue 259°. 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 6.87:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.05:1 |
| White text | 6.87:1 |
Values
| HEX | #0A55BE |
| RGB | rgb(10, 85, 190) |
| HSL | hsl(215, 90%, 39%) |
| OKLCH | oklch(47.5% 0.178 259.3) |
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 #0A55BE | 6.87:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #0A55BE | 3.05:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #0A55BE text on white | 6.87:1 | AA | Lc 83.0 | Fine for body text |
| #0A55BE text on black | 3.05:1 | AA large text | Lc -19.0 | 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
#C7DBFA
oklch(88.6% 0.048 259.1)
-
Step 300
300
#9FC2F9
oklch(80.8% 0.087 259.3)
-
Step 400
400
#6BA1F6
oklch(70.8% 0.138 259.1)
-
Step 500
500
#4186F2
oklch(63.1% 0.177 259.2)
-
Step 600
600
#1F6DE1
oklch(55.7% 0.192 259.1)
-
Step 700
700 (this color)
#0A55BE
oklch(47.5% 0.178 259.3)
-
Step 800
800
#124A9E
oklch(42.7% 0.148 259.2)
-
Step 900
900
#173F7D
oklch(37.7% 0.115 259.2)
-
Step 950
950
#0F2549
oklch(26.9% 0.073 259.8)
#0A55BE 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) | #0062C2 | 0.034 |
| Deuteranopia (no green cones) | #0053BC | 0.007 |
| Tritanopia (no blue cones) | #006F81 | 0.134 |
| Achromatopsia (no color) | #5A5A5A | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A55BE
#0A55BE
oklch(47.5% 0.178 259.3)
- #7A5500
#7A5500
oklch(47.7% 0.099 79.4)
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 #0A55BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.045
- Mid Blue #276AB3 ΔE 0.065
- Majorelle Blue #3F37C9 ΔE 0.072
- Warm Blue #4B57DB ΔE 0.072
- Sapphire #2138AB ΔE 0.074
- Azul #1D5DEC ΔE 0.076
- Dusk Blue #26538D ΔE 0.079
- Cobalt #1E488F ΔE 0.080
Use #0A55BE 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.