#1C57BF
Closest named color: Blue Blue (#2242C7). oklch(48.4% 0.174 260.9), rgb(28, 87, 191).
Aa
White text reads best on this color (6.63:1).
About this color
#1C57BF is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.174 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.050 away. White text reads best on it, at 6.63:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.16:1 |
| White text | 6.63:1 |
Values
| HEX | #1C57BF |
| RGB | rgb(28, 87, 191) |
| HSL | hsl(218, 74%, 43%) |
| OKLCH | oklch(48.4% 0.174 260.9) |
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 #1C57BF | 6.63:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #1C57BF | 3.16:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #1C57BF text on white | 6.63:1 | AA | Lc 82.2 | Fine for body text |
| #1C57BF text on black | 3.16:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A2C2F8
oklch(81% 0.084 260.7)
-
Step 400
400
#6FA0F4
oklch(70.7% 0.135 260.7)
-
Step 500
500
#4985F0
oklch(63% 0.173 261)
-
Step 600
600
#2B6CDF
oklch(55.6% 0.188 260.9)
-
Step 700
700 (this color)
#1C57BF
oklch(48.4% 0.174 260.9)
-
Step 800
800
#1B4A9C
oklch(42.8% 0.143 260.7)
-
Step 900
900
#1C3F7C
oklch(37.8% 0.111 260.6)
-
Step 950
950
#112549
oklch(27% 0.072 261.1)
#1C57BF 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) | #0064C3 | 0.033 |
| Deuteranopia (no green cones) | #0056BD | 0.012 |
| Tritanopia (no blue cones) | #007182 | 0.135 |
| Achromatopsia (no color) | #5D5D5D | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C57BF
#1C57BF
oklch(48.4% 0.174 260.9)
- #7B5700
#7B5700
oklch(48.3% 0.1 80.7)
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 #1C57BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.050
- Mid Blue #276AB3 ΔE 0.058
- Warm Blue #4B57DB ΔE 0.064
- Azul #1D5DEC ΔE 0.071
- Majorelle Blue #3F37C9 ΔE 0.072
- French Blue #436BAD ΔE 0.076
- Denim Blue #3B5B92 ΔE 0.078
- Blue With A Hint Of Purple #533CC6 ΔE 0.078
Use #1C57BF 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.