#1055A5
Closest named color: Dusk Blue (#26538D). oklch(45.7% 0.144 256), rgb(16, 85, 165).
Aa
White text reads best on this color (7.33:1).
About this color
#1055A5 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.144 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.040 away. White text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.86:1 |
| White text | 7.33:1 |
Values
| HEX | #1055A5 |
| RGB | rgb(16, 85, 165) |
| HSL | hsl(212, 82%, 35%) |
| OKLCH | oklch(45.7% 0.144 256) |
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 #1055A5 | 7.33:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #1055A5 | 2.86:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #1055A5 text on white | 7.33:1 | AAA | Lc 84.9 | Fine for body text |
| #1055A5 text on black | 2.86:1 | Fails | Lc -17.1 | 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 800.
-
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
#C5DBF8
oklch(88.4% 0.047 255.4)
-
Step 300
300
#9DC3F7
oklch(80.8% 0.085 256.3)
-
Step 400
400
#66A2F3
oklch(70.6% 0.135 256.3)
-
Step 500
500
#3789EF
oklch(63.2% 0.172 255.8)
-
Step 600
600
#0570DD
oklch(55.7% 0.187 255.8)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800 (this color)
#1055A5
oklch(45.7% 0.144 256)
-
Step 900
900
#10407C
oklch(37.6% 0.114 256.4)
-
Step 950
950
#0B2648
oklch(26.9% 0.071 255.8)
#1055A5 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) | #265DA8 | 0.028 |
| Deuteranopia (no green cones) | #0050A3 | 0.016 |
| Tritanopia (no blue cones) | #006875 | 0.107 |
| Achromatopsia (no color) | #565656 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1055A5
#1055A5
oklch(45.7% 0.144 256)
- #754E00
#754E00
oklch(45.6% 0.096 75.8)
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 #1055A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.040
- Cobalt #1E488F ΔE 0.047
- Denim Blue #3B5B92 ΔE 0.051
- Light Navy #155084 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.059
- Peacock Blue #016795 ΔE 0.062
- Mid Blue #276AB3 ΔE 0.065
Use #1055A5 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.