#1C5371
Closest named color: Deep Sea Blue (#015482). oklch(42.1% 0.075 236.6), rgb(28, 83, 113).
Aa
White text reads best on this color (8.31:1).
About this color
#1C5371 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.075 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.029 away. White text reads best on it, at 8.31:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.52:1 |
| White text | 8.31:1 |
Values
| HEX | #1C5371 |
| RGB | rgb(28, 83, 113) |
| HSL | hsl(201, 60%, 28%) |
| OKLCH | oklch(42.1% 0.075 236.6) |
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 #1C5371 | 8.31:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #1C5371 | 2.52:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #1C5371 text on white | 8.31:1 | AAA | Lc 88.4 | Fine for body text |
| #1C5371 text on black | 2.52:1 | Fails | Lc -13.7 | 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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A6C6DA
oklch(81% 0.045 235.5)
-
Step 400
400
#76A8C7
oklch(70.8% 0.07 236.3)
-
Step 500
500
#4F92B9
oklch(63.2% 0.09 236.1)
-
Step 600
600
#307BA5
oklch(55.5% 0.098 237)
-
Step 700
700
#21688D
oklch(49.1% 0.09 236)
-
Step 800
800 (this color)
#1C5371
oklch(42.1% 0.075 236.6)
-
Step 900
900
#1F465D
oklch(37.7% 0.059 237.1)
-
Step 950
950
#132936
oklch(26.9% 0.037 236.3)
#1C5371 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) | #455372 | 0.044 |
| Deuteranopia (no green cones) | #394A70 | 0.037 |
| Tritanopia (no blue cones) | #005B5D | 0.050 |
| Achromatopsia (no color) | #4E4E4E | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C5371
#1C5371
oklch(42.1% 0.075 236.6)
- #6C4221
#6C4221
oklch(42.1% 0.075 57)
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 #1C5371, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.029
- Light Navy #155084 ΔE 0.036
- Petrol #005F6A ΔE 0.044
- Deep Teal #00555A ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.047
- Dusk Blue #26538D ΔE 0.049
Use #1C5371 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.