#0553A1
Closest named color: Dusk Blue (#26538D). oklch(44.7% 0.143 254.8), rgb(5, 83, 161).
Aa
White text reads best on this color (7.61:1).
About this color
#0553A1 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.143 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.036 away. White text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.75:1 |
| White text | 7.61:1 |
Values
| HEX | #0553A1 |
| RGB | rgb(5, 83, 161) |
| HSL | hsl(210, 94%, 33%) |
| OKLCH | oklch(44.7% 0.143 254.8) |
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 #0553A1 | 7.61:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #0553A1 | 2.75:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #0553A1 text on white | 7.61:1 | AAA | Lc 85.8 | Fine for body text |
| #0553A1 text on black | 2.75:1 | Fails | Lc -16.3 | 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
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C5DBF8
oklch(88.4% 0.047 255.4)
-
Step 300
300
#9CC4F6
oklch(80.9% 0.083 254.3)
-
Step 400
400
#64A3F2
oklch(70.7% 0.134 254.9)
-
Step 500
500
#3489EE
oklch(63.1% 0.172 255.1)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800 (this color)
#0553A1
oklch(44.7% 0.143 254.8)
-
Step 900
900
#0D417B
oklch(37.7% 0.112 254.9)
-
Step 950
950
#0A2648
oklch(26.9% 0.072 255.3)
#0553A1 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) | #255BA4 | 0.031 |
| Deuteranopia (no green cones) | #004E9F | 0.015 |
| Tritanopia (no blue cones) | #006672 | 0.106 |
| Achromatopsia (no color) | #545454 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0553A1
#0553A1
oklch(44.7% 0.143 254.8)
- #734B00
#734B00
oklch(44.7% 0.095 74.1)
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 #0553A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.036
- Cobalt #1E488F ΔE 0.039
- Light Navy #155084 ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.055
- Peacock Blue #016795 ΔE 0.065
- Blueberry #464196 ΔE 0.068
Use #0553A1 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.