#1C5D99
Closest named color: Denim Blue (#3B5B92). oklch(47% 0.116 250.5), rgb(28, 93, 153).
Aa
White text reads best on this color (6.82:1).
About this color
#1C5D99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.116 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.027 away. White text reads best on it, at 6.82:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.07:1 |
| White text | 6.82:1 |
Values
| HEX | #1C5D99 |
| RGB | rgb(28, 93, 153) |
| HSL | hsl(209, 69%, 35%) |
| OKLCH | oklch(47% 0.116 250.5) |
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 #1C5D99 | 6.82:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #1C5D99 | 3.07:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #1C5D99 text on white | 6.82:1 | AA | Lc 83.2 | Fine for body text |
| #1C5D99 text on black | 3.07:1 | AA large text | Lc -18.8 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A6C4E4
oklch(80.9% 0.056 250.2)
-
Step 400
400
#75A5D7
oklch(70.7% 0.09 250.2)
-
Step 500
500
#508DCC
oklch(63% 0.115 250.8)
-
Step 600
600
#3176B9
oklch(55.5% 0.125 250.6)
-
Step 700
700 (this color)
#1C5D99
oklch(47% 0.116 250.5)
-
Step 800
800
#1F5181
oklch(42.6% 0.096 250.4)
-
Step 900
900
#1F4468
oklch(37.8% 0.075 249.9)
-
Step 950
950
#13283D
oklch(27.1% 0.048 250)
#1C5D99 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) | #40619B | 0.036 |
| Deuteranopia (no green cones) | #2D5698 | 0.021 |
| Tritanopia (no blue cones) | #006B73 | 0.085 |
| Achromatopsia (no color) | #5B5B5B | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C5D99
#1C5D99
oklch(47% 0.116 250.5)
- #7E4F00
#7E4F00
oklch(47% 0.101 70.5)
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 #1C5D99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.029
- Dusk Blue #26538D ΔE 0.032
- Peacock Blue #016795 ΔE 0.032
- Denim #3B638C ΔE 0.041
- Dusky Blue #475F94 ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.047
- Light Navy #155084 ΔE 0.049
Use #1C5D99 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.