#1C577C
Closest named color: Deep Sea Blue (#015482). oklch(43.7% 0.085 240.6), rgb(28, 87, 124).
Aa
White text reads best on this color (7.76:1).
About this color
#1C577C is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.085 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.020 away. White text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #1C577C |
| RGB | rgb(28, 87, 124) |
| HSL | hsl(203, 63%, 30%) |
| OKLCH | oklch(43.7% 0.085 240.6) |
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 #1C577C | 7.76:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #1C577C | 2.70:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #1C577C text on white | 7.76:1 | AAA | Lc 86.7 | Fine for body text |
| #1C577C text on black | 2.70:1 | Fails | Lc -15.4 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A5C5DE
oklch(80.8% 0.049 241.8)
-
Step 400
400
#72A7CE
oklch(70.6% 0.08 241.2)
-
Step 500
500
#4A91C1
oklch(63.1% 0.102 240.6)
-
Step 600
600
#287AAE
oklch(55.5% 0.112 241.3)
-
Step 700
700
#196795
oklch(49.1% 0.103 240.5)
-
Step 800
800 (this color)
#1C577C
oklch(43.7% 0.085 240.6)
-
Step 900
900
#1C4661
oklch(37.8% 0.066 240)
-
Step 950
950
#112939
oklch(27% 0.042 240.1)
#1C577C 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) | #46577E | 0.044 |
| Deuteranopia (no green cones) | #394E7B | 0.035 |
| Tritanopia (no blue cones) | #006064 | 0.057 |
| Achromatopsia (no color) | #525252 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C577C
#1C577C
oklch(43.7% 0.085 240.6)
- #73451A
#73451A
oklch(43.6% 0.085 60.2)
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 #1C577C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.020
- Light Navy Blue #2E5A88 ΔE 0.027
- Light Navy #155084 ΔE 0.029
- Dusk Blue #26538D ΔE 0.034
- YInMn Blue #415A77 ΔE 0.039
- Petrol #005F6A ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.049
- Denim #3B638C ΔE 0.054
Use #1C577C 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.