#103F7E
Closest named color: Twilight Blue (#0A437A). oklch(37.6% 0.118 257.5), rgb(16, 63, 126).
Aa
White text reads best on this color (10.32:1).
About this color
#103F7E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.118 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.014 away. White text reads best on it, at 10.32:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.03:1 |
| White text | 10.32:1 |
Values
| HEX | #103F7E |
| RGB | rgb(16, 63, 126) |
| HSL | hsl(214, 77%, 28%) |
| OKLCH | oklch(37.6% 0.118 257.5) |
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 #103F7E | 10.32:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #103F7E | 2.03:1 | Fails | Lc 10.4 | Not readable |
| #103F7E text on white | 10.32:1 | AAA | Lc 93.5 | Preferred for body text |
| #103F7E text on black | 2.03:1 | Fails | Lc -9.0 | 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 900.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9DC3FA
oklch(81% 0.088 257.6)
-
Step 400
400
#65A1F7
oklch(70.6% 0.141 257.5)
-
Step 500
500
#3887F4
oklch(63.1% 0.181 257.4)
-
Step 600
600
#0A6DE3
oklch(55.5% 0.197 257.6)
-
Step 700
700
#005BC3
oklch(49.1% 0.179 257.6)
-
Step 800
800
#044B9F
oklch(42.7% 0.15 257.3)
-
Step 900
900 (this color)
#103F7E
oklch(37.6% 0.118 257.5)
-
Step 950
950
#0C264A
oklch(27.1% 0.074 257.4)
#103F7E 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) | #1A4680 | 0.023 |
| Deuteranopia (no green cones) | #003C7D | 0.013 |
| Tritanopia (no blue cones) | #004E58 | 0.089 |
| Achromatopsia (no color) | #404040 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103F7E
#103F7E
oklch(37.6% 0.118 257.5)
- #583B00
#583B00
oklch(37.6% 0.078 77.7)
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 #103F7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.014
- Cobalt #1E488F ΔE 0.040
- Marine Blue #01386A ΔE 0.041
- Light Navy #155084 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.062
- Dusk Blue #26538D ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.069
- Marine #042E60 ΔE 0.071
Use #103F7E 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.