#0055A7
Closest named color: Dusk Blue (#26538D). oklch(45.6% 0.149 254.8), rgb(0, 85, 167).
Aa
White text reads best on this color (7.34:1).
About this color
#0055A7 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.149 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.044 away. White text reads best on it, at 7.34:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.85:1 |
| White text | 7.34:1 |
Values
| HEX | #0055A7 |
| RGB | rgb(0, 85, 167) |
| HSL | hsl(209, 100%, 33%) |
| OKLCH | oklch(45.6% 0.149 254.8) |
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 #0055A7 | 7.34:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #0055A7 | 2.85:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #0055A7 text on white | 7.34:1 | AAA | Lc 84.8 | Fine for body text |
| #0055A7 text on black | 2.85:1 | Fails | Lc -17.2 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBF9
oklch(88.4% 0.048 255.1)
-
Step 300
300
#9AC4F9
oklch(80.9% 0.088 254.5)
-
Step 400
400
#61A3F6
oklch(70.8% 0.14 255)
-
Step 500
500
#2D89F2
oklch(63.1% 0.179 254.8)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB9
oklch(49.2% 0.161 254.8)
-
Step 800
800 (this color)
#0055A7
oklch(45.6% 0.149 254.8)
-
Step 900
900
#08417D
oklch(37.8% 0.116 254.6)
-
Step 950
950
#082649
oklch(26.9% 0.074 254.8)
#0055A7 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) | #235DAA | 0.030 |
| Deuteranopia (no green cones) | #0050A5 | 0.014 |
| Tritanopia (no blue cones) | #006976 | 0.110 |
| Achromatopsia (no color) | #565656 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0055A7
#0055A7
oklch(45.6% 0.149 254.8)
- #764E00
#764E00
oklch(45.7% 0.096 75.1)
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 #0055A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.044
- Cobalt #1E488F ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.056
- Light Navy #155084 ΔE 0.057
- Light Navy Blue #2E5A88 ΔE 0.060
- Deep Sea Blue #015482 ΔE 0.061
- Peacock Blue #016795 ΔE 0.064
- Mid Blue #276AB3 ΔE 0.066
Use #0055A7 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.