#0557C1
Closest named color: Blue Blue (#2242C7). oklch(48.2% 0.18 258.7), rgb(5, 87, 193).
Aa
White text reads best on this color (6.68:1).
About this color
#0557C1 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.180 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.048 away. White text reads best on it, at 6.68:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.13:1 |
| White text | 6.68:1 |
Values
| HEX | #0557C1 |
| RGB | rgb(5, 87, 193) |
| HSL | hsl(214, 95%, 39%) |
| OKLCH | oklch(48.2% 0.18 258.7) |
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 #0557C1 | 6.68:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #0557C1 | 3.13:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #0557C1 text on white | 6.68:1 | AA | Lc 82.2 | Fine for body text |
| #0557C1 text on black | 3.13:1 | AA large text | Lc -19.7 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9EC2F9
oklch(80.8% 0.088 258.7)
-
Step 400
400
#69A1F7
oklch(70.8% 0.14 258.7)
-
Step 500
500
#3E86F3
oklch(63% 0.179 258.7)
-
Step 600
600
#1A6DE2
oklch(55.7% 0.194 258.7)
-
Step 700
700 (this color)
#0557C1
oklch(48.2% 0.18 258.7)
-
Step 800
800
#0E4A9F
oklch(42.7% 0.15 258.8)
-
Step 900
900
#153F7E
oklch(37.7% 0.117 258.8)
-
Step 950
950
#0E254A
oklch(26.9% 0.075 259.5)
#0557C1 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) | #0064C5 | 0.034 |
| Deuteranopia (no green cones) | #0055BF | 0.006 |
| Tritanopia (no blue cones) | #007283 | 0.137 |
| Achromatopsia (no color) | #5C5C5C | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0557C1
#0557C1
oklch(48.2% 0.18 258.7)
- #7C5600
#7C5600
oklch(48.2% 0.1 78.9)
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 #0557C1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.048
- Mid Blue #276AB3 ΔE 0.063
- Warm Blue #4B57DB ΔE 0.069
- Azul #1D5DEC ΔE 0.070
- Majorelle Blue #3F37C9 ΔE 0.074
- Sapphire #2138AB ΔE 0.080
- Royal Blue #4169E1 ΔE 0.082
- French Blue #436BAD ΔE 0.082
Use #0557C1 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.