#437898
Closest named color: Cerulean (#457B9D). oklch(54.9% 0.076 236.9), rgb(67, 120, 152).
Aa
White text reads best on this color (4.79:1).
About this color
#437898 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.076 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.011 away. White text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.37:1 |
| White text | 4.79:1 |
Values
| HEX | #437898 |
| RGB | rgb(67, 120, 152) |
| HSL | hsl(203, 39%, 43%) |
| OKLCH | oklch(54.9% 0.076 236.9) |
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 #437898 | 4.79:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #437898 | 4.37:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #437898 text on white | 4.79:1 | AA | Lc 73.1 | Content text, not long reading |
| #437898 text on black | 4.37:1 | AA large text | Lc -28.6 | 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 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ADC4D4
oklch(80.8% 0.034 238.3)
-
Step 400
400
#81A6BF
oklch(70.7% 0.055 238.1)
-
Step 500
500
#6090AE
oklch(63.1% 0.069 236.8)
-
Step 600
600 (this color)
#437898
oklch(54.9% 0.076 236.9)
-
Step 700
700
#366784
oklch(49.2% 0.071 236.6)
-
Step 800
800
#2E546B
oklch(42.8% 0.058 236.8)
-
Step 900
900
#294557
oklch(37.6% 0.046 237.9)
-
Step 950
950
#192933
oklch(27.1% 0.028 236.7)
#437898 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) | #69779A | 0.045 |
| Deuteranopia (no green cones) | #5D6E97 | 0.039 |
| Tritanopia (no blue cones) | #008083 | 0.059 |
| Achromatopsia (no color) | #727272 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #437898
#437898
oklch(54.9% 0.076 236.9)
- #936644
#936644
oklch(55% 0.076 57.5)
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 #437898, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.011
- Dull Blue #49759C ΔE 0.013
- Stormy Blue #507B9C ΔE 0.018
- Metallic Blue #4F738E ΔE 0.020
- Muted Blue #3B719F ΔE 0.028
- Flat Blue #3C73A8 ΔE 0.033
- Ocean #017B92 ΔE 0.038
- Sea Blue #047495 ΔE 0.040
Use #437898 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.