#16557C
Closest named color: Deep Sea Blue (#015482). oklch(43% 0.089 241.2), rgb(22, 85, 124).
Aa
White text reads best on this color (8.00:1).
About this color
#16557C is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.089 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.014 away. White text reads best on it, at 8.00:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.62:1 |
| White text | 8.00:1 |
Values
| HEX | #16557C |
| RGB | rgb(22, 85, 124) |
| HSL | hsl(203, 70%, 29%) |
| OKLCH | oklch(43% 0.089 241.2) |
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 #16557C | 8.00:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #16557C | 2.62:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #16557C text on white | 8.00:1 | AAA | Lc 87.4 | Fine for body text |
| #16557C text on black | 2.62:1 | Fails | Lc -14.7 | Not readable |
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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A3C6E0
oklch(81% 0.053 240.5)
-
Step 400
400
#70A7D0
oklch(70.6% 0.084 241.6)
-
Step 500
500
#4791C4
oklch(63.1% 0.107 241.3)
-
Step 600
600
#237AB0
oklch(55.5% 0.115 241.4)
-
Step 700
700
#136798
oklch(49.2% 0.108 241.3)
-
Step 800
800 (this color)
#16557C
oklch(43% 0.089 241.2)
-
Step 900
900
#1A4663
oklch(37.8% 0.069 241)
-
Step 950
950
#10293A
oklch(27% 0.044 240.8)
#16557C 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) | #43567E | 0.045 |
| Deuteranopia (no green cones) | #354C7B | 0.035 |
| Tritanopia (no blue cones) | #005F63 | 0.060 |
| Achromatopsia (no color) | #505050 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #16557C
#16557C
oklch(43% 0.089 241.2)
- #724312
#724312
oklch(43% 0.089 61.7)
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 #16557C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.014
- Light Navy #155084 ΔE 0.023
- Light Navy Blue #2E5A88 ΔE 0.032
- Dusk Blue #26538D ΔE 0.033
- YInMn Blue #415A77 ΔE 0.046
- Petrol #005F6A ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.054
- Cobalt #1E488F ΔE 0.054
Use #16557C 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.