#1C5791
Closest named color: Dusk Blue (#26538D). oklch(45% 0.112 251.6), rgb(28, 87, 145).
Aa
White text reads best on this color (7.44:1).
About this color
#1C5791 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.112 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.013 away. White text reads best on it, at 7.44:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.82:1 |
| White text | 7.44:1 |
Values
| HEX | #1C5791 |
| RGB | rgb(28, 87, 145) |
| HSL | hsl(210, 68%, 34%) |
| OKLCH | oklch(45% 0.112 251.6) |
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 #1C5791 | 7.44:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #1C5791 | 2.82:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #1C5791 text on white | 7.44:1 | AAA | Lc 85.5 | Fine for body text |
| #1C5791 text on black | 2.82:1 | Fails | Lc -16.5 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A2C4EA
oklch(80.9% 0.065 251.5)
-
Step 400
400
#6EA5E0
oklch(70.8% 0.105 251.1)
-
Step 500
500
#458DD8
oklch(63.2% 0.135 251.6)
-
Step 600
600
#2275C5
oklch(55.6% 0.146 251.8)
-
Step 700
700
#1262AA
oklch(49.1% 0.136 251.5)
-
Step 800
800 (this color)
#1C5791
oklch(45% 0.112 251.6)
-
Step 900
900
#19436E
oklch(37.7% 0.087 251.7)
-
Step 950
950
#102841
oklch(27.2% 0.056 251.4)
#1C5791 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) | #3B5B93 | 0.032 |
| Deuteranopia (no green cones) | #295090 | 0.021 |
| Tritanopia (no blue cones) | #00656D | 0.083 |
| Achromatopsia (no color) | #555555 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C5791
#1C5791
oklch(45% 0.112 251.6)
- #764B00
#764B00
oklch(45.1% 0.097 71.9)
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 #1C5791, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.013
- Light Navy Blue #2E5A88 ΔE 0.024
- Light Navy #155084 ΔE 0.029
- Deep Sea Blue #015482 ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.032
- Cobalt #1E488F ΔE 0.043
- Peacock Blue #016795 ΔE 0.046
- Denim #3B638C ΔE 0.050
Use #1C5791 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.