#1D70A4
Closest named color: Ocean Blue (#03719C). oklch(52.3% 0.112 242), rgb(29, 112, 164).
Aa
White text reads best on this color (5.37:1).
About this color
#1D70A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.112 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.017 away. White text reads best on it, at 5.37:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.90:1 |
| White text | 5.37:1 |
Values
| HEX | #1D70A4 |
| RGB | rgb(29, 112, 164) |
| HSL | hsl(203, 70%, 38%) |
| OKLCH | oklch(52.3% 0.112 242) |
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 #1D70A4 | 5.37:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #1D70A4 | 3.90:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #1D70A4 text on white | 5.37:1 | AA | Lc 76.4 | Fine for body text |
| #1D70A4 text on black | 3.90:1 | AA large text | Lc -25.4 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C6E1
oklch(81% 0.054 241.5)
-
Step 400
400
#6FA7D2
oklch(70.6% 0.086 242.5)
-
Step 500
500
#4491C6
oklch(63.1% 0.11 241.6)
-
Step 600
600
#1E7AB3
oklch(55.6% 0.12 242)
-
Step 700
700 (this color)
#1D70A4
oklch(52.3% 0.112 242)
-
Step 800
800
#12547D
oklch(42.8% 0.092 242)
-
Step 900
900
#184664
oklch(37.8% 0.071 241.1)
-
Step 950
950
#10293B
oklch(27.1% 0.046 242.4)
#1D70A4 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) | #5771A6 | 0.052 |
| Deuteranopia (no green cones) | #4565A3 | 0.041 |
| Tritanopia (no blue cones) | #007D82 | 0.077 |
| Achromatopsia (no color) | #6A6A6A | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D70A4
#1D70A4
oklch(52.3% 0.112 242)
- #965915
#965915
oklch(52.3% 0.111 62.4)
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 #1D70A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.017
- Muted Blue #3B719F ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.026
- Nice Blue #107AB0 ΔE 0.031
- Sea Blue #047495 ΔE 0.031
- Mid Blue #276AB3 ΔE 0.033
- French Blue #436BAD ΔE 0.036
- Peacock Blue #016795 ΔE 0.036
Use #1D70A4 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.