#1C3E6D
Closest named color: Twilight Blue (#0A437A). oklch(36.5% 0.091 257.1), rgb(28, 62, 109).
Aa
White text reads best on this color (10.71:1).
About this color
#1C3E6D is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.091 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 10.71:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.95:1 |
| White text | 10.71:1 |
Values
| HEX | #1C3E6D |
| RGB | rgb(28, 62, 109) |
| HSL | hsl(215, 59%, 27%) |
| OKLCH | oklch(36.5% 0.091 257.1) |
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 #1C3E6D | 10.71:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #1C3E6D | 1.95:1 | Fails | Lc 9.3 | Not readable |
| #1C3E6D text on white | 10.71:1 | AAA | Lc 94.6 | Preferred for body text |
| #1C3E6D text on black | 1.95:1 | Fails | Lc -8.0 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADBF3
oklch(88.6% 0.038 257)
-
Step 300
300
#A5C3ED
oklch(81% 0.068 256.8)
-
Step 400
400
#74A2E4
oklch(70.6% 0.109 257.4)
-
Step 500
500
#4F8ADC
oklch(63.2% 0.139 257)
-
Step 600
600
#3272CA
oklch(55.7% 0.151 257.2)
-
Step 700
700
#245FAE
oklch(49.1% 0.14 257)
-
Step 800
800
#204E8D
oklch(42.7% 0.116 257.2)
-
Step 900
900 (this color)
#1C3E6D
oklch(36.5% 0.091 257.1)
-
Step 950
950
#132742
oklch(27.1% 0.057 256.4)
#1C3E6D 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) | #28426F | 0.019 |
| Deuteranopia (no green cones) | #1B3A6C | 0.012 |
| Tritanopia (no blue cones) | #004950 | 0.071 |
| Achromatopsia (no color) | #3E3E3E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C3E6D
#1C3E6D
oklch(36.5% 0.091 257.1)
- #543800
#543800
oklch(36.4% 0.076 77.5)
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 #1C3E6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Marine Blue #01386A ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.055
- Charcoal #264653 ΔE 0.059
- Marine #042E60 ΔE 0.059
- Light Navy #155084 ΔE 0.061
Use #1C3E6D 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.