#12748B
Closest named color: Sea Blue (#047495). oklch(51.8% 0.089 219), rgb(18, 116, 139).
Aa
White text reads best on this color (5.38:1).
About this color
#12748B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.089 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.016 away. White text reads best on it, at 5.38:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.89:1 |
| White text | 5.38:1 |
Values
| HEX | #12748B |
| RGB | rgb(18, 116, 139) |
| HSL | hsl(191, 77%, 31%) |
| OKLCH | oklch(51.8% 0.089 219) |
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 #12748B | 5.38:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #12748B | 3.89:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #12748B text on white | 5.38:1 | AA | Lc 76.4 | Fine for body text |
| #12748B text on black | 3.89:1 | AA large text | Lc -25.3 | 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 700.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A2C8D4
oklch(80.9% 0.044 219)
-
Step 400
400
#6EABBE
oklch(70.7% 0.069 219.6)
-
Step 500
500
#4196AE
oklch(63.1% 0.089 219.4)
-
Step 600
600
#148099
oklch(55.6% 0.096 218.8)
-
Step 700
700 (this color)
#12748B
oklch(51.8% 0.089 219)
-
Step 800
800
#0A586A
oklch(42.6% 0.074 218.8)
-
Step 900
900
#154956
oklch(37.8% 0.058 217.9)
-
Step 950
950
#0F2B33
oklch(27.1% 0.037 219.3)
#12748B 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) | #66718C | 0.075 |
| Deuteranopia (no green cones) | #56658B | 0.067 |
| Tritanopia (no blue cones) | #007C7B | 0.041 |
| Achromatopsia (no color) | #6A6A6A | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12748B
#12748B
oklch(51.8% 0.089 219)
- #945541
#945541
oklch(51.8% 0.09 38.4)
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 #12748B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.016
- Ocean #017B92 ΔE 0.021
- Deep Aqua #08787F ΔE 0.026
- Ocean Blue #03719C ΔE 0.031
- Deep Turquoise #017374 ΔE 0.038
- Bluegreen #017A79 ΔE 0.040
- Dark Aquamarine #017371 ΔE 0.043
- Muted Blue #3B719F ΔE 0.046
Use #12748B 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.