#12759B
Closest named color: Sea Blue (#047495). oklch(52.8% 0.102 230.9), rgb(18, 117, 155).
Aa
White text reads best on this color (5.19:1).
About this color
#12759B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.102 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.011 away. White text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #12759B |
| RGB | rgb(18, 117, 155) |
| HSL | hsl(197, 79%, 34%) |
| OKLCH | oklch(52.8% 0.102 230.9) |
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 #12759B | 5.19:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #12759B | 4.04:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #12759B text on white | 5.19:1 | AA | Lc 75.3 | Fine for body text |
| #12759B text on black | 4.04:1 | AA large text | Lc -26.4 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A4C7D9
oklch(81% 0.045 230.4)
-
Step 400
400
#70A9C6
oklch(70.6% 0.073 231.3)
-
Step 500
500
#4694B8
oklch(63.2% 0.094 230.7)
-
Step 600
600 (this color)
#12759B
oklch(52.8% 0.102 230.9)
-
Step 700
700
#0F6A8C
oklch(49.2% 0.094 230.3)
-
Step 800
800
#135672
oklch(42.7% 0.078 231.4)
-
Step 900
900
#19475C
oklch(37.7% 0.061 231.4)
-
Step 950
950
#102A36
oklch(27.1% 0.039 230.5)
#12759B 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) | #62749D | 0.069 |
| Deuteranopia (no green cones) | #50679A | 0.058 |
| Tritanopia (no blue cones) | #007F82 | 0.058 |
| Achromatopsia (no color) | #6D6D6D | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12759B
#12759B
oklch(52.8% 0.102 230.9)
- #995830
#995830
oklch(52.7% 0.102 50.6)
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 #12759B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.011
- Ocean Blue #03719C ΔE 0.014
- Ocean #017B92 ΔE 0.026
- Muted Blue #3B719F ΔE 0.028
- Nice Blue #107AB0 ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.036
- Dull Blue #49759C ΔE 0.038
- Cerulean #457B9D ΔE 0.041
Use #12759B 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.