#11739E
Closest named color: Ocean Blue (#03719C). oklch(52.5% 0.106 234.6), rgb(17, 115, 158).
Aa
White text reads best on this color (5.28:1).
About this color
#11739E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.106 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.008 away. White text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.96:1 |
| White text | 5.28:1 |
Values
| HEX | #11739E |
| RGB | rgb(17, 115, 158) |
| HSL | hsl(198, 81%, 34%) |
| OKLCH | oklch(52.5% 0.106 234.6) |
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 #11739E | 5.28:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #11739E | 3.96:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #11739E text on white | 5.28:1 | AA | Lc 75.8 | Fine for body text |
| #11739E text on black | 3.96:1 | AA large text | Lc -25.9 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE8
oklch(88.4% 0.026 235.4)
-
Step 300
300
#A3C6DB
oklch(80.8% 0.048 234.5)
-
Step 400
400
#70A9C9
oklch(70.7% 0.076 233.9)
-
Step 500
500
#4693BC
oklch(63.2% 0.098 234.5)
-
Step 600
600 (this color)
#11739E
oklch(52.5% 0.106 234.6)
-
Step 700
700
#106990
oklch(49.2% 0.098 234.3)
-
Step 800
800
#135575
oklch(42.6% 0.082 235.3)
-
Step 900
900
#19475E
oklch(37.8% 0.063 233.8)
-
Step 950
950
#102A37
oklch(27.1% 0.04 232.6)
#11739E 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) | #5E72A0 | 0.064 |
| Deuteranopia (no green cones) | #4C669D | 0.053 |
| Tritanopia (no blue cones) | #007E82 | 0.064 |
| Achromatopsia (no color) | #6C6C6C | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #11739E
#11739E
oklch(52.5% 0.106 234.6)
- #985827
#985827
oklch(52.5% 0.105 55.1)
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 #11739E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.008
- Sea Blue #047495 ΔE 0.016
- Muted Blue #3B719F ΔE 0.025
- Nice Blue #107AB0 ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.032
- Ocean #017B92 ΔE 0.035
- Peacock Blue #016795 ΔE 0.038
- Dull Blue #49759C ΔE 0.040
Use #11739E 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.