#103E55
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.5% 0.063 234.9), rgb(16, 62, 85).
Aa
White text reads best on this color (11.39:1).
About this color
#103E55 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.063 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.018 away. White text reads best on it, at 11.39:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.84:1 |
| White text | 11.39:1 |
Values
| HEX | #103E55 |
| RGB | rgb(16, 62, 85) |
| HSL | hsl(200, 68%, 20%) |
| OKLCH | oklch(34.5% 0.063 234.9) |
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 #103E55 | 11.39:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #103E55 | 1.84:1 | Fails | Lc 7.9 | Not readable |
| #103E55 text on white | 11.39:1 | AAA | Lc 96.0 | Preferred for body text |
| #103E55 text on black | 1.84:1 | Fails | Lc 0.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF2
oklch(93.7% 0.013 233.7)
-
Step 200
200
#C9DCE8
oklch(88.4% 0.026 235.4)
-
Step 300
300
#A4C6DB
oklch(80.9% 0.047 235.3)
-
Step 400
400
#71A9C9
oklch(70.8% 0.075 234.4)
-
Step 500
500
#4893BB
oklch(63.2% 0.096 234.4)
-
Step 600
600
#237CA7
oklch(55.5% 0.104 234.8)
-
Step 700
700
#146990
oklch(49.2% 0.097 234.8)
-
Step 800
800
#155575
oklch(42.6% 0.081 235.7)
-
Step 900
900 (this color)
#103E55
oklch(34.5% 0.063 234.9)
-
Step 950
950
#112937
oklch(26.9% 0.04 236.4)
#103E55 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) | #333E56 | 0.039 |
| Deuteranopia (no green cones) | #293755 | 0.032 |
| Tritanopia (no blue cones) | #004446 | 0.039 |
| Achromatopsia (no color) | #3A3A3A | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103E55
#103E55
oklch(34.5% 0.063 234.9)
- #523017
#523017
oklch(34.6% 0.062 55.2)
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 #103E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.018
- Midnight Green #073B4C ΔE 0.019
- Prussian Blue #1D3557 ΔE 0.031
- Charcoal #264653 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.039
- Marine Blue #01386A ΔE 0.046
- Gunmetal #293241 ΔE 0.048
- Onyx #343A40 ΔE 0.050
Use #103E55 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.