#125799
Closest named color: Dusk Blue (#26538D). oklch(45.3% 0.126 252.3), rgb(18, 87, 153).
Aa
White text reads best on this color (7.37:1).
About this color
#125799 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.126 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.022 away. White text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #125799 |
| RGB | rgb(18, 87, 153) |
| HSL | hsl(209, 79%, 34%) |
| OKLCH | oklch(45.3% 0.126 252.3) |
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 #125799 | 7.37:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #125799 | 2.84:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #125799 text on white | 7.37:1 | AAA | Lc 85.1 | Fine for body text |
| #125799 text on black | 2.84:1 | Fails | Lc -16.9 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DBF4
oklch(88.4% 0.041 252.8)
-
Step 300
300
#9FC4EF
oklch(80.9% 0.073 252.5)
-
Step 400
400
#68A4E8
oklch(70.6% 0.118 252.6)
-
Step 500
500
#3B8CE1
oklch(63.1% 0.15 252.3)
-
Step 600
600
#0C74CF
oklch(55.6% 0.164 252.4)
-
Step 700
700
#0061B1
oklch(49.1% 0.148 252.3)
-
Step 800
800 (this color)
#125799
oklch(45.3% 0.126 252.3)
-
Step 900
900
#124373
oklch(37.8% 0.097 251.8)
-
Step 950
950
#0D2744
oklch(27% 0.063 253.3)
#125799 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) | #355C9C | 0.033 |
| Deuteranopia (no green cones) | #1C5098 | 0.019 |
| Tritanopia (no blue cones) | #006770 | 0.093 |
| Achromatopsia (no color) | #565656 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #125799
#125799
oklch(45.3% 0.126 252.3)
- #764C00
#764C00
oklch(45.3% 0.096 73)
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 #125799, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.036
- Light Navy #155084 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.039
- Cobalt #1E488F ΔE 0.043
- Peacock Blue #016795 ΔE 0.049
- Dusky Blue #475F94 ΔE 0.057
Use #125799 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.